Diagnose of water use on irrigation of crops in hydrological basin of Jundiai-Mirim river / SP / Diagnostico do uso da agua na irrigação de culturas na bacia do Rio Jundiai-Mirim / SP

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

Recent researches demonstrate that the use of water for agriculture represents 60% of total consumption of freshwater in Brazil and that many irrigation systems do not have any control of the use of water for this activity. Also, it is estimated that 40% of the water applied in irrigation is misused by percolation and superficial drainage, what generates a great number of impacts to soil and water, such as compactation and sealing of superficial soil, silting up of water bodies, decrease of quality, and wasting of hydric resource, promoting a negative effect on the river basin. With the duty of payment of a tariff for use of water, irrigated agriculture will deserve special attention, with the developmente of education programs to stimulate the correct handling of equipments and to disseminate knowledge about water and soil conservation. This study was carried out on irrigated areas in Jundiaí, Jarinú and Campo Limpo Paulista County, located in the Jundiaí-Mirim River basin, in São Paulo state (Brazil), with the purpose to develop a simple methodology to diagnose the use of water for crop irrigation in the area and to catalog the farmers. It also included an evaluation of the irrigation quality process in the farms using an Irrigation Quality Index (IQI), which is based on parameters related to water, soil, irrigated crop and handling of equipments. In the methodology development, it was used field research with questionnaires, Global Position System (GPS), Geographical Information System (GIS) and specific software for these systems. With the obtained results, it was elaborated the analysis of the use of water in local irrigation and organized a digital databank, available for use by public institutions and other people interested on the development of public policies on environmental monitoring and water resources. It was also possible to evaluate the farming knowledge about the duty of payment of a tariff for use of water, and to develop a methodology to estimate de quality of irrigation with some simple parameters that identify aspects related to the use of irrigation systems

ASSUNTO(S)

geographic information systems agua - uso irrigação agricola sistemas de informação geografica tariff for use of water farmer s catalog

ACESSO AO ARTIGO

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