Dynamics of Soil Erosion as Influenced by Watershed Management Practices: A Case Study of the Agula Watershed in the Semi-Arid Highlands of Northern Ethiopia.
Identifieur interne : 000032 ( PubMed/Checkpoint ); précédent : 000031; suivant : 000033Dynamics of Soil Erosion as Influenced by Watershed Management Practices: A Case Study of the Agula Watershed in the Semi-Arid Highlands of Northern Ethiopia.
Auteurs : Ayele Almaw Fenta [Japon] ; Hiroshi Yasuda [Japon] ; Katsuyuki Shimizu [Japon] ; Nigussie Haregeweyn [Japon] ; Aklilu Negussie [Éthiopie]Source :
- Environmental management [ 1432-1009 ] ; 2016.
Abstract
Since the past two decades, watershed management practices such as construction of stone bunds and establishment of exclosures have been widely implemented in the semi-arid highlands of northern Ethiopia to curb land degradation by soil erosion. This study assessed changes in soil erosion for the years 1990, 2000 and 2012 as a result of such watershed management practices in Agula watershed using the Revised Universal Soil Loss Equation. The Revised Universal Soil Loss Equation factors were computed in a geographic information system for 30 × 30 m raster layers using spatial data obtained from different sources. The results revealed significant reduction in soil loss rates by about 55 % from about 28 to 12 t ha(-1) per year in 1990-2000 and an overall 64 % reduction from 28 to 10 t ha(-1) per year in 1990-2012. This change in soil loss is attributed to improvement in surface cover and stone bund practices, which resulted in the decrease in mean C and P-factors, respectively, by about 19 % and 34 % in 1990-2000 and an overall decrease in C-factor by 29 % in 1990-2012. Considerable reductions in soil loss were observed from bare land (89 %), followed by cultivated land (56 %) and shrub land (49 %). Furthermore, the reduction in soil loss was more pronounced in steeper slopes where very steep slope and steep slope classes experienced over 70 % reduction. Validation of soil erosion estimations using field observed points showed an overall accuracy of 69 %, which is fairly satisfactory. This study demonstrated the potential of watershed management efforts to bring remarkable restoration of degraded semi-arid lands that could serve as a basis for sustainable planning of future developments of areas experiencing severe land degradation due to water erosion.
DOI: 10.1007/s00267-016-0757-4
PubMed: 27605225
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Box 5689, Addis Ababa, Ethiopia.</nlm:affiliation><country xml:lang="fr">Éthiopie</country><wicri:regionArea>World Agroforestry Centre (ICRAF), P.O. Box 5689, Addis Ababa</wicri:regionArea><wicri:noRegion>Addis Ababa</wicri:noRegion></affiliation></author></analytic><series><title level="j">Environmental management</title><idno type="eISSN">1432-1009</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Since the past two decades, watershed management practices such as construction of stone bunds and establishment of exclosures have been widely implemented in the semi-arid highlands of northern Ethiopia to curb land degradation by soil erosion. This study assessed changes in soil erosion for the years 1990, 2000 and 2012 as a result of such watershed management practices in Agula watershed using the Revised Universal Soil Loss Equation. The Revised Universal Soil Loss Equation factors were computed in a geographic information system for 30 × 30 m raster layers using spatial data obtained from different sources. The results revealed significant reduction in soil loss rates by about 55 % from about 28 to 12 t ha(-1) per year in 1990-2000 and an overall 64 % reduction from 28 to 10 t ha(-1) per year in 1990-2012. This change in soil loss is attributed to improvement in surface cover and stone bund practices, which resulted in the decrease in mean C and P-factors, respectively, by about 19 % and 34 % in 1990-2000 and an overall decrease in C-factor by 29 % in 1990-2012. Considerable reductions in soil loss were observed from bare land (89 %), followed by cultivated land (56 %) and shrub land (49 %). Furthermore, the reduction in soil loss was more pronounced in steeper slopes where very steep slope and steep slope classes experienced over 70 % reduction. Validation of soil erosion estimations using field observed points showed an overall accuracy of 69 %, which is fairly satisfactory. This study demonstrated the potential of watershed management efforts to bring remarkable restoration of degraded semi-arid lands that could serve as a basis for sustainable planning of future developments of areas experiencing severe land degradation due to water erosion.</div></front></TEI><pubmed><MedlineCitation Status="In-Data-Review" Owner="NLM"><PMID Version="1">27605225</PMID><DateCreated><Year>2016</Year><Month>09</Month><Day>08</Day></DateCreated><DateRevised><Year>2016</Year><Month>10</Month><Day>10</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1432-1009</ISSN><JournalIssue CitedMedium="Internet"><Volume>58</Volume><Issue>5</Issue><PubDate><Year>2016</Year><Month>Nov</Month></PubDate></JournalIssue><Title>Environmental management</Title><ISOAbbreviation>Environ Manage</ISOAbbreviation></Journal><ArticleTitle>Dynamics of Soil Erosion as Influenced by Watershed Management Practices: A Case Study of the Agula Watershed in the Semi-Arid Highlands of Northern Ethiopia.</ArticleTitle><Pagination><MedlinePgn>889-905</MedlinePgn></Pagination><Abstract><AbstractText NlmCategory="UNASSIGNED">Since the past two decades, watershed management practices such as construction of stone bunds and establishment of exclosures have been widely implemented in the semi-arid highlands of northern Ethiopia to curb land degradation by soil erosion. This study assessed changes in soil erosion for the years 1990, 2000 and 2012 as a result of such watershed management practices in Agula watershed using the Revised Universal Soil Loss Equation. The Revised Universal Soil Loss Equation factors were computed in a geographic information system for 30 × 30 m raster layers using spatial data obtained from different sources. The results revealed significant reduction in soil loss rates by about 55 % from about 28 to 12 t ha(-1) per year in 1990-2000 and an overall 64 % reduction from 28 to 10 t ha(-1) per year in 1990-2012. This change in soil loss is attributed to improvement in surface cover and stone bund practices, which resulted in the decrease in mean C and P-factors, respectively, by about 19 % and 34 % in 1990-2000 and an overall decrease in C-factor by 29 % in 1990-2012. Considerable reductions in soil loss were observed from bare land (89 %), followed by cultivated land (56 %) and shrub land (49 %). Furthermore, the reduction in soil loss was more pronounced in steeper slopes where very steep slope and steep slope classes experienced over 70 % reduction. Validation of soil erosion estimations using field observed points showed an overall accuracy of 69 %, which is fairly satisfactory. This study demonstrated the potential of watershed management efforts to bring remarkable restoration of degraded semi-arid lands that could serve as a basis for sustainable planning of future developments of areas experiencing severe land degradation due to water erosion.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Fenta</LastName><ForeName>Ayele Almaw</ForeName><Initials>AA</Initials><Identifier Source="ORCID">http://orcid.org/0000-0002-8228-4048</Identifier><AffiliationInfo><Affiliation>Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori , 680-0001, Japan. almawayele@yahoo.com.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Land Resources Management and Environmental Protection, Mekelle University, P.O. Box 231, Mekelle, Ethiopia. almawayele@yahoo.com.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Yasuda</LastName><ForeName>Hiroshi</ForeName><Initials>H</Initials><AffiliationInfo><Affiliation>Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori , 680-0001, Japan.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Shimizu</LastName><ForeName>Katsuyuki</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori , 680-8553, Japan.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Haregeweyn</LastName><ForeName>Nigussie</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>International Platform for Dryland Research and Education, Tottori University, 1390 Hamasaka, Tottori , 680-0001, Japan.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Negussie</LastName><ForeName>Aklilu</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>World Agroforestry Centre (ICRAF), P.O. Box 5689, Addis Ababa, Ethiopia.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2016</Year><Month>09</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Environ Manage</MedlineTA><NlmUniqueID>7703893</NlmUniqueID><ISSNLinking>0364-152X</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Ethiopia</Keyword><Keyword MajorTopicYN="N">RUSLE model</Keyword><Keyword MajorTopicYN="N">Semi-arid</Keyword><Keyword MajorTopicYN="N">Soil erosion</Keyword><Keyword MajorTopicYN="N">Watershed management</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2016</Year><Month>03</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2016</Year><Month>08</Month><Day>09</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2016</Year><Month>9</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2016</Year><Month>9</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2016</Year><Month>9</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">27605225</ArticleId><ArticleId IdType="doi">10.1007/s00267-016-0757-4</ArticleId><ArticleId IdType="pii">10.1007/s00267-016-0757-4</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Japon</li><li>Éthiopie</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Fenta, Ayele Almaw" sort="Fenta, Ayele Almaw" uniqKey="Fenta A" first="Ayele Almaw" last="Fenta">Ayele Almaw Fenta</name></noRegion><name sortKey="Haregeweyn, Nigussie" sort="Haregeweyn, Nigussie" uniqKey="Haregeweyn N" first="Nigussie" last="Haregeweyn">Nigussie Haregeweyn</name><name sortKey="Shimizu, Katsuyuki" sort="Shimizu, Katsuyuki" uniqKey="Shimizu K" first="Katsuyuki" last="Shimizu">Katsuyuki Shimizu</name><name sortKey="Yasuda, Hiroshi" sort="Yasuda, Hiroshi" uniqKey="Yasuda H" first="Hiroshi" last="Yasuda">Hiroshi Yasuda</name></country><country name="Éthiopie"><noRegion><name sortKey="Negussie, Aklilu" sort="Negussie, Aklilu" uniqKey="Negussie A" first="Aklilu" last="Negussie">Aklilu Negussie</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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