论文部分内容阅读
在用水系数基础上分析经济部门用水关联的方法存在局限。应用改进的假设抽取法(HEM)关联分析方法,以2002年张掖市地区水利用投入产出表数据为例,定量测算了张掖市产业部门间用水的关联作用。结果证实,①经济系统虚拟水转移与实体水利用存在总量平衡的关系,在一定的经济结构下,最终需求总量不变时,其结构调整不会对用水总量产生影响;②改进的HEM法将系数比较转化为实际用水数量组成因素分解,更直观、明确地量化了部门间以及部门内部用水关联。
There are limitations on the method of analyzing water use in economic sectors on the basis of water consumption coefficient. By using the improved HEM correlation analysis method and taking the data of input and output of water use in Zhangye City in 2002 as an example, the correlation between water use among industries in Zhangye City was quantitatively calculated. The results show that ① the relationship between the virtual water transfer in economic system and the total water balance exists, and under the certain economic structure, when the total final demand remains unchanged, the structural adjustment will not affect the total water consumption; ② improved The HEM method transforms the coefficient comparison into the decomposition of the actual quantity of water used to quantify the water use within and between departments more intuitively and clearly.