Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia
Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Mengie Belayneh [verfasserIn] Teshome Yirgu [verfasserIn] Dereje Tsegaye [verfasserIn] |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2020 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: Global Ecology and Conservation - Elsevier, 2015, 24(2020), Seite e01255- |
|---|---|
| Übergeordnetes Werk: |
volume:24 ; year:2020 ; pages:e01255- |
| Links: |
|---|
| DOI / URN: |
10.1016/j.gecco.2020.e01255 |
|---|
| Katalog-ID: |
DOAJ057589496 |
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| 520 | |a Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. | ||
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| 650 | 4 | |a Gully morphology | |
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10.1016/j.gecco.2020.e01255 doi (DE-627)DOAJ057589496 (DE-599)DOAJf066334a186742b98dad12bf6dfd9cdd DE-627 ger DE-627 rakwb eng QH540-549.5 Mengie Belayneh verfasserin aut Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. Gullies Gully morphology Gully expansion Soil loss Gully temporal variability Satellite imageries Ecology Teshome Yirgu verfasserin aut Dereje Tsegaye verfasserin aut In Global Ecology and Conservation Elsevier, 2015 24(2020), Seite e01255- (DE-627)820688959 (DE-600)2814786-8 23519894 nnns volume:24 year:2020 pages:e01255- https://doi.org/10.1016/j.gecco.2020.e01255 kostenfrei https://doaj.org/article/f066334a186742b98dad12bf6dfd9cdd kostenfrei http://www.sciencedirect.com/science/article/pii/S2351989420307964 kostenfrei https://doaj.org/toc/2351-9894 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 24 2020 e01255- |
| spelling |
10.1016/j.gecco.2020.e01255 doi (DE-627)DOAJ057589496 (DE-599)DOAJf066334a186742b98dad12bf6dfd9cdd DE-627 ger DE-627 rakwb eng QH540-549.5 Mengie Belayneh verfasserin aut Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. Gullies Gully morphology Gully expansion Soil loss Gully temporal variability Satellite imageries Ecology Teshome Yirgu verfasserin aut Dereje Tsegaye verfasserin aut In Global Ecology and Conservation Elsevier, 2015 24(2020), Seite e01255- (DE-627)820688959 (DE-600)2814786-8 23519894 nnns volume:24 year:2020 pages:e01255- https://doi.org/10.1016/j.gecco.2020.e01255 kostenfrei https://doaj.org/article/f066334a186742b98dad12bf6dfd9cdd kostenfrei http://www.sciencedirect.com/science/article/pii/S2351989420307964 kostenfrei https://doaj.org/toc/2351-9894 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 24 2020 e01255- |
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10.1016/j.gecco.2020.e01255 doi (DE-627)DOAJ057589496 (DE-599)DOAJf066334a186742b98dad12bf6dfd9cdd DE-627 ger DE-627 rakwb eng QH540-549.5 Mengie Belayneh verfasserin aut Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. Gullies Gully morphology Gully expansion Soil loss Gully temporal variability Satellite imageries Ecology Teshome Yirgu verfasserin aut Dereje Tsegaye verfasserin aut In Global Ecology and Conservation Elsevier, 2015 24(2020), Seite e01255- (DE-627)820688959 (DE-600)2814786-8 23519894 nnns volume:24 year:2020 pages:e01255- https://doi.org/10.1016/j.gecco.2020.e01255 kostenfrei https://doaj.org/article/f066334a186742b98dad12bf6dfd9cdd kostenfrei http://www.sciencedirect.com/science/article/pii/S2351989420307964 kostenfrei https://doaj.org/toc/2351-9894 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 24 2020 e01255- |
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10.1016/j.gecco.2020.e01255 doi (DE-627)DOAJ057589496 (DE-599)DOAJf066334a186742b98dad12bf6dfd9cdd DE-627 ger DE-627 rakwb eng QH540-549.5 Mengie Belayneh verfasserin aut Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. Gullies Gully morphology Gully expansion Soil loss Gully temporal variability Satellite imageries Ecology Teshome Yirgu verfasserin aut Dereje Tsegaye verfasserin aut In Global Ecology and Conservation Elsevier, 2015 24(2020), Seite e01255- (DE-627)820688959 (DE-600)2814786-8 23519894 nnns volume:24 year:2020 pages:e01255- https://doi.org/10.1016/j.gecco.2020.e01255 kostenfrei https://doaj.org/article/f066334a186742b98dad12bf6dfd9cdd kostenfrei http://www.sciencedirect.com/science/article/pii/S2351989420307964 kostenfrei https://doaj.org/toc/2351-9894 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 24 2020 e01255- |
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10.1016/j.gecco.2020.e01255 doi (DE-627)DOAJ057589496 (DE-599)DOAJf066334a186742b98dad12bf6dfd9cdd DE-627 ger DE-627 rakwb eng QH540-549.5 Mengie Belayneh verfasserin aut Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. Gullies Gully morphology Gully expansion Soil loss Gully temporal variability Satellite imageries Ecology Teshome Yirgu verfasserin aut Dereje Tsegaye verfasserin aut In Global Ecology and Conservation Elsevier, 2015 24(2020), Seite e01255- (DE-627)820688959 (DE-600)2814786-8 23519894 nnns volume:24 year:2020 pages:e01255- https://doi.org/10.1016/j.gecco.2020.e01255 kostenfrei https://doaj.org/article/f066334a186742b98dad12bf6dfd9cdd kostenfrei http://www.sciencedirect.com/science/article/pii/S2351989420307964 kostenfrei https://doaj.org/toc/2351-9894 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 24 2020 e01255- |
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The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. 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Mengie Belayneh |
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Mengie Belayneh misc QH540-549.5 misc Gullies misc Gully morphology misc Gully expansion misc Soil loss misc Gully temporal variability misc Satellite imageries misc Ecology Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia |
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QH540-549.5 Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia Gullies Gully morphology Gully expansion Soil loss Gully temporal variability Satellite imageries |
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Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia |
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Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia |
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current extent, temporal trends, and rates of gully erosion in the gumara watershed, northwestern ethiopia |
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Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia |
| abstract |
Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. |
| abstractGer |
Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. |
| abstract_unstemmed |
Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’. |
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Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ057589496</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230308214323.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230227s2020 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.gecco.2020.e01255</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ057589496</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJf066334a186742b98dad12bf6dfd9cdd</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">QH540-549.5</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Mengie Belayneh</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Current extent, temporal trends, and rates of gully erosion in the Gumara watershed, Northwestern Ethiopia</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2020</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Gully erosion is among the foremost challenges for the sustainability of the land resource and agricultural activities in sub-humid northwestern Ethiopia. Understanding the situation of the current extent and temporal variation of gully expansion can help to curb the problem. However, temporal gully erosion studies are very limited. In this paper, the current extent, temporal change trends, and rates of gully erosion in the Gumara watershed are studied. A total of 241 cross-sections representing 44 gullies were surveyed, and their temporal changes over the period 2001–2018 are analyzed. The analysis was performed using a time series high-resolution satellite imageries and field surveys. The study result shows that currently, the total gully length is 10.04 km, and gully density is 1.87 km km−2. The total soil loss was 273, 066 t since the first gully incision in 1985. Similarly, the estimated total surface area damage was 11.42 ha. Gully length, density, surface area damage, and soil loss had increased from 3.83 to 10.04 km, 0.71–1.87 km km−2, 3.31–11.42 ha, and 60.58 to 273.07 × 103 t, respectively over the period 2001–2018. The average short-term rate of change of gully length, surface area damage, and soil loss were 1.75 m ha−1 yr−1, 13.44 m2 ha−1 yr−1, and 30.5 t ha−1 yr−1, respectively from 2001 to 2005. The medium-term average rate of increase in length, surface area damage, and soil loss was 0.68 m ha−1 yr−1, 8.91 m2 ha−1 yr−1, and 23.34 t ha−1 yr−1, respectively, over the period 2001–2018. Gullies are young and actively expanding. The expansion trend has been increasing with a decreasing rate, but the rate is still very high. However, gully rehabilitation practices so far are very limited, although, little effort is made in eucalyptus tree plantations by smallholder farmers. Therefore, the existing soil and water conservation practices on plots need to be strengthened, and large-scale gully bank rehabilitation is recommended by participating in all stakeholders’.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gullies</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gully morphology</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gully expansion</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Soil loss</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gully temporal variability</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Satellite imageries</subfield></datafield><datafield tag="653" ind1=" " ind2="0"><subfield code="a">Ecology</subfield></datafield><datafield tag="700" ind1="0" ind2=" "><subfield code="a">Teshome Yirgu</subfield><subfield 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