【摘要】 本文在农业水资源效用评价理论框架体系下,进一步完善了农业水资源效用综合评价方法体系:提出了评价模型,确定评价方法并构建了评价指标体系。应用提出的评价理论和方法体系,对华北平原井灌区的代表——北京大兴进行了案例研究。评价结果显示,大兴地区农业水资源利用效用综合得分均保持在良好状态区间,其最大的原因在于经济效益持续较好,贡献了总效应得分的50%以上,而环境效益则相对较差,除了有两年处于正常状态外,其余年份均处于警戒状态。评价结果表明大兴地区农业水资源利用存在着比较突出的环境问题,具体表现为水污染严重,水质较差,地下水超采严重。案例研究的结果与专家的研判大致相符证明了该方法体系的科学性和合理性,下一步的重点是如何从区域差异上解决方法的普适性问题。更多还原

【Abstract】 The study focuses on the theoretical application of comprehensive evaluation of agriculture water utility(AWU) to Da-xing County,Beijing. Based on hierarchical structure of Target-Criterion-Index,the evaluation index system of agriculture water utility of Da-xing county,Beijing is constructed. Furthermore, the agriculture water utility of Da-xing county for the period of 2003-2008 is evaluated by application of the Analysis Hierarchy Process(AHP),which proves that AHP might be the proper method applicable to comprehensive evaluation of agriculture water utility. The evaluation results reveal that the actual effect of agriculture water utilization in Da-xing County,Beijing is in a good condition. The main reason for such results is that economic benefit of agriculture water utilization received an outstanding effect,contributing more than 50% score of comprehensive utility. On the contrary,eco-environment benefit is relatively poor. More than 60% of evaluated years is in the state of alert. The main problems for eco-environment of Daxin County are serious pollution and groundwater overexploitation.更多还原