Research on agricultural water rights trading in the Mahaweli River Basin of Sri Lanka under uncertainty
In the process of water resources utilization,water right trading can promote the subjects with low water use efficiency to transfer water rights to the subjects with high marginal water use benefit,thereby realize maximize the overall benefit of the region.As an important node country of the"Belt and Road"initiative.The Mahaweli River basin in Sri Lanka was selected as the survey region to constructing the agricultural water rights trading model based on the interval two-stage stochastic bi-level uncertainty planning method,and dealing with the indeterminacy of socio-economic data,the randomness of surface water resources and the multi-objective of the system.The research revealed that the initial total water rights were affected by climate change,which positively correlated with precipitation and negatively correlated with temperature.In addition,in the water rights transaction,rice planting industry was the main buyer,and dairy and livestock industry was the main seller.After the water rights transaction,the industries and regions holding the largest amount of water rights were rice planting industry and Polonnaruwa County,wherein the initial water rights allocation had a significant influence on the water rights holding.The research results can improve the scientific management of water resources in the Mahaweli River basin under the changing climate,and gradually create a positive pattern of water resources management and water rights distribution.
uncertaintywater rights tradingSri LankaMahaweli Basinwater resources management
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