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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
15/07/1996 |
Data da última atualização: |
05/09/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SHARMA, P. N.; SILVA, A. de S. |
Afiliação: |
PREN NIWAS SHARMA, INSTITUTO INTERAMERICANO DE COOPERAÇÃO PARA A AGRICULTURA; ADERALDO DE SOUZA SILVA, CPATSA. |
Título: |
Effect of clearing native forest (Caatinga) strips on some hydrologic components of micro-watersheds. |
Ano de publicação: |
1988 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 23, n. 7, p. 781-788, jul. 1988. |
Idioma: |
Inglês |
Conteúdo: |
The influences of clearing native vegetation (Caatinga) in contour strips at 25 cm vertical interval on evaporation losses in cleared strips, annual runoff efficiency and annuall soil loss on gently sloped micro-waterheds in the arid zones of Northeast Brazil are reported. The alternate native vegetation (Caatinga) strips function very effectively as windbreaks thus reducing evaporation losses substantially in the leeward cleared strips. The runoff measured at the micro-watershed with cleared strips was many-fold lower than the runoff obtained at a completely denuded watershed even when it was protected by narrow based channel terraces. However, the annual runoff efficiency can be significantly increased in a strip cleared watershed if narrow based channel terraces are provided on the lower side of cleared strips. The annual soil losses in strip cleared watersheds as well as completely denuded waterhed of gentle slopes were negligible. Thus clearing land in alternate contour strips on a micro-watersheds shall substantially improve crop water use efficiency without creating any significant erosion problems. Additionally this treatment will increase runoff for water harvesting for irrigation purposes. |
Palavras-Chave: |
Arid land; Management; Terra arida; Watershed. |
Thesagro: |
Água; Bacia Hidrográfica; Caatinga; Desmatamento; Irrigação; Manejo; Solo; Vegetação. |
Thesaurus Nal: |
deforestation; irrigation; soil; vegetation; water. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143603/1/8064-1.pdf
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Marc: |
LEADER 02091naa a2200337 a 4500 001 1133195 005 2024-09-05 008 1988 bl uuuu u00u1 u #d 100 1 $aSHARMA, P. N. 245 $aEffect of clearing native forest (Caatinga) strips on some hydrologic components of micro-watersheds. 260 $c1988 520 $aThe influences of clearing native vegetation (Caatinga) in contour strips at 25 cm vertical interval on evaporation losses in cleared strips, annual runoff efficiency and annuall soil loss on gently sloped micro-waterheds in the arid zones of Northeast Brazil are reported. The alternate native vegetation (Caatinga) strips function very effectively as windbreaks thus reducing evaporation losses substantially in the leeward cleared strips. The runoff measured at the micro-watershed with cleared strips was many-fold lower than the runoff obtained at a completely denuded watershed even when it was protected by narrow based channel terraces. However, the annual runoff efficiency can be significantly increased in a strip cleared watershed if narrow based channel terraces are provided on the lower side of cleared strips. The annual soil losses in strip cleared watersheds as well as completely denuded waterhed of gentle slopes were negligible. Thus clearing land in alternate contour strips on a micro-watersheds shall substantially improve crop water use efficiency without creating any significant erosion problems. Additionally this treatment will increase runoff for water harvesting for irrigation purposes. 650 $adeforestation 650 $airrigation 650 $asoil 650 $avegetation 650 $awater 650 $aÁgua 650 $aBacia Hidrográfica 650 $aCaatinga 650 $aDesmatamento 650 $aIrrigação 650 $aManejo 650 $aSolo 650 $aVegetação 653 $aArid land 653 $aManagement 653 $aTerra arida 653 $aWatershed 700 1 $aSILVA, A. de S. 773 $tPesquisa Agropecuária Brasileira$gv. 23, n. 7, p. 781-788, jul. 1988.
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