基于水足迹理论的德州市水资源利用分析

Analysis of water resources utilization in Dezhou based on water footprint theory

为分析区域水资源利用情况,本研究基于水足迹理论对德州市水足迹进行了核算与分析,并运用脱钩模型研究了水资源利用与经济增长的关系。结果表明:1)粮食作物小麦、玉米虚拟水足迹较高,经济作物蔬菜、棉花、水果等虚拟水足迹较低,动物产品禽蛋、牛肉虚拟水足迹较高;2)水足迹构成差异明显,农业水足迹占据主导地位,总灰水足迹占总水足迹的42.72%,消纳污水需要淡水资源较多;3)人均水足迹较高,水资源匮乏指数和水资源压力指数均大于10,水资源严重超载,水资源进口依赖度低,水资源利用效率不断增高;4)水资源利用与经济增长在2010—2011、2011—2012、2016—2017年为弱脱钩,其余年份为强脱钩。德州市农业发展对水资源依赖性较强,经济发展对水资源依赖性降低,用水效率提高。

In order to analyze the situation of regional water resources utilization,this study calculates and analyzes the water footprint of Dezhou based on water footprint theory,and studies the relationship between water resources utilization and economic growth by using decoupling model.The results show that:1)The virtual water footprint of grain crops wheat and corn are higher,the virtual water footprint of cash crops vegetables,cotton and fruits are lower,and the virtual water footprint of animal products poultry eggs and beef are higher.2)The water footprint composition is significantly different,and the agricultural water footprint occupies a dominant position.The total grey water footprint accounts for 42.72%of the total water footprint.More fresh water are needed to absorb sewage.3)The per capita water footprint is high.Water resource scarcity index and water resource stress index are both greater than 10 and water resources are seriously overloaded.Water resource import dependence is low and water resource utilization efficiency is constantly increasing.4)The state of water resources utilization and economic growth are weak decoupling in 2010—2011,2011—2012,2016—2017,and strong decoupling in other years.This study shows that the agricultural development of Dezhou is more dependent on water resources and the economic development is less dependent on water resources,and the water use efficiency is improved.