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Assessing driving factors of regional water use in production sectors using a structural decomposition method: a case study in Jiangsu Province, China

机译：用结构分解法评估生产部门区域用水的驱动因素：以江苏省为例

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摘要

A key issue in water resources management in China is the adoption of a total volume control framework of water supply at a regional level corresponding to socioeconomic development. This requires more efficient water demand management in order to achieve a balance between water supply and demand. The purpose of this paper is to conduct a thorough analysis of the water use structure of production sectors in order to identify the major impact factors and thus provide insights for demand management policy design. Taking Jiangsu Province as a case study, we compile a series of extended input-output (I-O) tables at a constant price and establish an I-O structural decomposition model. The major factors leading to change in water use by production sectors (primary, secondary and tertiary) in the Jiangsu Province during five time periods from 1997-2010 are categorized into structure effect, water use efficiency effect, and demand effect for each of three levels: (1) aggregated sectors, (2) sub-aggregated sectors, and (3) individual sectors. Within the study period, the demand effect consistently leads to an increase in water utilization and the increase effect becomes weaker over time, while the other two factors consistently lead to a decrease in water utilization and their dampening effect becomes stronger.
机译：中国水资源管理的关键问题是在区域层面采用与社会经济发展相对应的总量控制水供应框架。这需要更有效的需水管理，以实现供需之间的平衡。本文的目的是对生产部门的用水结构进行彻底的分析，以确定主要的影响因素，从而为需求管理政策设计提供见解。以江苏省为例，以一定的价格编制了一系列扩展的投入产出表，建立了投入产出结构分解模型。从1997年至2010年的五个时间段内，导致江苏省生产部门（第一，第二和第三产业）用水变化的主要因素分为三个层次，分别是结构效应，用水效率效应和需求效应。 ：（1）汇总部门，（2）子汇总部门，以及（3）单个部门。在研究期内，需求效应始终导致用水量增加，随着时间的推移，增加作用变弱，而其他两个因素始终导致用水量减少，其阻尼作用变强。

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