SURFACE RUNOFF AND SOIL AND WATER USAGE AT SERRAGEM STREAN BASING â PARAÃBA VALLEY / O ESCOAMENTO SUPERFICIAL E O USO DO SOLO E DA ÃGUA NA BACIA DO RIBEIRÃO DA SERRAGEM â VALE DO PARAÃBA

AUTOR(ES)

CHRISTIAN KATHER

DATA DE PUBLICAÇÃO

2005

RESUMO

The need for differentiated utilization of surface runoff at Hydrographic Basins is causing a series of disagreements related to its method of using. In some sites at Vale do ParaÃba (ParaÃba Valley) distribution and water consumption break-downs have been occurring. Hydric resources utilized until recently at Hydrographic Basin of Serragem Stream was predominantly from rice producers and the great impacts caused by water shortage have brought changes in local rural activities. However, in nowadays, activities are being distributed over industries, fish hatcheries, frog breeding and abandoned sand furrows areas.The objective of this work was surface runoff study (downstream) from amortization reservoir aiming to supply rice irrigation associated with various land usages (upstream). The âFloaterâ was the method applied to measure outflow from July to December, 2004. In terms of physical characteristics, hydrologic studies of maximum outflow were done by applying I-paiwu Method and by using Microsoft Excel Program. In order to generate thematic maps of usage and land occupation, maps and satellite images were also utilized. From the data obtained it was concluded that within six properties (downstream) of the dam the volume captured is elevated compared to the prior-approved by DAEE (Water Management Department). Although this basin is intensively used, it presents a significant regenerated grassy cover (22,6%) that could contribute to water availability in the future specially if managed according to criteria of conservation and selected planting at cultivated plains.

ASSUNTO(S)

ribeirÃo da serragem balanÃo hÃdrico serragem stream valetas de drenagem surface runoff escoamento superficial water conflict manejo e conservacao do solo drainage channel arroz irrigado conflito pelo uso da Ãgua water use watere balance irrigated rice

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