魏家沟小流域农业水土资源高效利用障碍诊断

Obstacle Diagnosis of Agricultural Soil and Water Resources High-efficient Utilization in Weijiagou Small Watershed

构建了农业水土资源开发利用评价指标体系,提出了量化评价方法。采用熵技术支持下的层次分析法(AHP)确定指标权重。通过指标的"障碍度"计算,确定区域水土资源高效利用影响因子的障碍排序。研究表明魏家沟小流域水土资源利用综合评价值为61.07,其农业水土资源高效利用影响因子的障碍排序依次是水土流失治理率、植被覆盖率、水分生产率、土壤侵蚀模数等。加强水土流失治理、发展节水灌溉和提高农业综合技术水平是该流域今后应优先采取的措施。

This paper constructs assessment index system of agricultural soil and water resources development and utilization,and brings forward quantificational assessment method.It confirms the index weight primary using the Analytic Hierarchy Process（AHP）,then revises it basing the communication degree showed output entropy of the various indices,and confirms the obstacle ranking impacting regional soil and water resources high-efficient utilization by calculating ＇obstacle degree＇ of indices.The results show that the comprehensive assessment value of agricultural soil and water resources development and utilization of Weijiagou small watershed is 61.07,the obstacle ranking of the soil and water resources high-efficient utilization is soil and water loss control rate,vegetation cover,water productivity,soil erosion modulus etc.For the future strengthening soil and water loss control,developing water saving irrigation and increasing agricultural integrate technical level should be the prior measure in this small watershed.