A tale of two rivers: Integrated hydro-economic modeling for the evaluation of trading opportunities and return flow externalities in inter-basin agricultural water markets
A tale of two rivers: Integrated hydro-economic modeling for the evaluation of trading opportunities and return flow externalities in inter-basin agricultural water markets
复制标题
两条河流的故事：用于评估跨流域农业水市场的贸易机会和回流外部性的综合水文经济模型
DOI：
10.1016/j.jhydrol.2020.124676
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发表时间：
2020
影响因子：
6.4
通讯作者：
C. Gutiérrez
中科院分区：
文献类型：
--
作者：
C. Pérez;A. Essenfelder;C. Gutiérrez
水市场是水管理工具，可以支持水从低价值农业用途向高价值农业用途的重新分配。然而，除非明确考虑不直接参与贸易的用水(例如环境)，否则水市场可能无法促进可持续增长。在跨流域水市场中，销售流域取水权利的重新分配通常涉及重新分配回流(灌溉用水退出农业系统后离开农业系统的地表水和地下水)以及消耗性用途，这可能会损害环境流动并影响销售流域下游的用水。本文采用顺序模块化方法，将模拟灌溉者行为的正向多属性效用规划(PMAUP)工具与水土评价工具(SWAT)生态水文模型相结合，以：i)评估回归流中性跨流域水资源市场的经济和水资源再分配潜力；ii)探索源于放松中性原则的交易-回报流权衡。方法被应用于西班牙塔古斯-塞古拉相互关联盆地的农业水市场的案例。结果表明，执行回流中性的水市场可以减少每立方米保守径流高达1.63欧元的交易回报。
Water markets are water management instruments that can support water reallocation from low to high value agricultural uses. However, unless explicit consideration is given to water uses not directly involved in the trading (e.g. environment), water markets may fail to promote sustainable growth. In inter-basin water markets, the reallocation of water withdrawal entitlements from the selling basin typically involves the reallocation of return flows (the surface and subsurface water that leaves the agricultural system following withdrawal of irrigation water) along with consumptive uses, which may impair environmental flows and affect water uses downstream in the selling basin. This paper couples, using a sequential modular approach, a Positive Multi-Attribute Utility Programming (PMAUP) tool that models the behavior of irrigators and the Soil and Water Assessment Tool (SWAT) eco-hydrologic model to: i) assess the economic and water reallocation potential of a return flow-neutral inter-basin water market; and ii) explore the trading-return flow tradeoffs that stem from relaxing the neutrality principle. Methods are applied to the case of agricultural water markets in the Tagus-Segura interconnected basins in Spain. Results show that enforcing a return flow-neutral water market can reduce returns from trade by up to EUR 1.63 per m3of conserved streamflow.