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Soil erosion assessment of Lake Alemaya catchment, Ethiopia

Identifieur interne : 000295 ( Istex/Corpus ); précédent : 000294; suivant : 000296

Soil erosion assessment of Lake Alemaya catchment, Ethiopia

Auteurs : S. Muleta ; F. Yohannes ; S. M. Rashid

Source :

RBID : ISTEX:307EADBE7846C09C9E5913FFA1E44AA803773942

English descriptors

Abstract

Land degradation due to soil erosion is the major problem facing Ethiopia today. In the Lake Alemaya catchment soil erosion is caused by the intense rainfall, steep topography, and poor vegetation cover coupled with cultivation of steep lands, and inadequate conservation practices. Sediment from the catchment has affected the storage capacity of Lake Alemaya. This study has integrated the Agricultural Non‐point Source Pollution Model (AGNPS) and the technique of the Gographic Information System (GIS) to quantify soil erosion in the Lake Alemaya catchment. After application of the AGNPS, it appears that 66 per cent of the catchment has a soil erosion rate of 10 to more than 80 t ha−1 y−1. The annual soil loss is estimated at 31 t ha−1, which is more than the permissible value of 1–16 t ha−1 for different agro‐ecological zones of Ethiopia. The sediment yield of the catchment is about 10 148 ton with a delivery ratio of 6·82 per cent. Therefore, an effective management plan is needed for the conservation and rehabilitation of the catchment and to maintain the storage capacity of Lake Alemaya. Copyright © 2006 John Wiley & Sons, Ltd.

Url:
DOI: 10.1002/ldr.713

Links to Exploration step

ISTEX:307EADBE7846C09C9E5913FFA1E44AA803773942

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<publisher>John Wiley & Sons, Ltd.</publisher>
<place>
<placeTerm type="text">Chichester, UK</placeTerm>
</place>
<dateIssued encoding="w3cdtf">2006-05</dateIssued>
<dateCaptured encoding="w3cdtf">2005-02-18</dateCaptured>
<dateValid encoding="w3cdtf">2005-08-01</dateValid>
<copyrightDate encoding="w3cdtf">2006</copyrightDate>
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<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
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<extent unit="figures">4</extent>
<extent unit="tables">3</extent>
<extent unit="references">19</extent>
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<abstract lang="en">Land degradation due to soil erosion is the major problem facing Ethiopia today. In the Lake Alemaya catchment soil erosion is caused by the intense rainfall, steep topography, and poor vegetation cover coupled with cultivation of steep lands, and inadequate conservation practices. Sediment from the catchment has affected the storage capacity of Lake Alemaya. This study has integrated the Agricultural Non‐point Source Pollution Model (AGNPS) and the technique of the Gographic Information System (GIS) to quantify soil erosion in the Lake Alemaya catchment. After application of the AGNPS, it appears that 66 per cent of the catchment has a soil erosion rate of 10 to more than 80 t ha−1 y−1. The annual soil loss is estimated at 31 t ha−1, which is more than the permissible value of 1–16 t ha−1 for different agro‐ecological zones of Ethiopia. The sediment yield of the catchment is about 10 148 ton with a delivery ratio of 6·82 per cent. Therefore, an effective management plan is needed for the conservation and rehabilitation of the catchment and to maintain the storage capacity of Lake Alemaya. Copyright © 2006 John Wiley & Sons, Ltd.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>AGNPS model</topic>
<topic>soil erosion</topic>
<topic>sediment yield</topic>
<topic>Lake Alemaya catchment</topic>
<topic>Ethiopia</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Land Degradation & Development</title>
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<titleInfo type="abbreviated">
<title>Land Degrad. Dev.</title>
</titleInfo>
<genre type="journal">journal</genre>
<subject>
<genre>article-category</genre>
<topic>Research Article</topic>
</subject>
<identifier type="ISSN">1085-3278</identifier>
<identifier type="eISSN">1099-145X</identifier>
<identifier type="DOI">10.1002/(ISSN)1099-145X</identifier>
<identifier type="PublisherID">LDR</identifier>
<part>
<date>2006</date>
<detail type="volume">
<caption>vol.</caption>
<number>17</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>3</number>
</detail>
<extent unit="pages">
<start>333</start>
<end>341</end>
<total>9</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">307EADBE7846C09C9E5913FFA1E44AA803773942</identifier>
<identifier type="DOI">10.1002/ldr.713</identifier>
<identifier type="ArticleID">LDR713</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 2006 John Wiley & Sons, Ltd.</accessCondition>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>John Wiley & Sons, Ltd.</recordOrigin>
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