비의류제품

gezira irrigation scheme in sudan: objectives, design, and performance

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 512
the report is part of a series of case studies on the performance of irrigation systems in different countries. these studies focus on the extent to which the design of the irrigation system fosters effective water management and provides equitable, reliable, timely water distribution to farms (analyzes water efficiencies, the effectiveness of maintenance, and cost recovery). water distribution from the gezira system to the fields is efficient, timely and reliable as long as the system is adequately maintained. there is no indication of rising of the groundwater table, and evidence of salinization is limited to fringe areas. despite the satisfactory water distribution in gezira, agricultural production is rather disappointing. yields of cotton and wheat, two of the main crops, are two to three times below the yields achieved in the research stations
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