【摘要】 根据降水条件和作物品种所得出的不同水文年的灌溉工程经济效益分摊系数 ,推算出北京市194 9年以来的灌溉工程经济效益为 310 .0 3亿元 ;指出节水灌溉在农业可持续发展中的重要作用 ;针对北京市水资源紧缺的现状 ,提出了农业可持续发展的对策。更多还原

【Abstract】 According to the allocation ratio of economic benefit from irrigation projects for different years calculated on the basis of precipitation conditions and crop varieties in Beijing,the total economic benefit from irrigation projects has been estimated to be 31.003 billion Yuan (RMB) since 1949.It is pointed out that irrigation water saving plays an important role in sustainable development of agriculture.Based on the analysis of water resources of Beijing,measures for promoting sustainable development of agriculture are proposed.更多还原