Research On Evaluation Of Sustainable Utilization Of Water Resource In Jiangsu Province Based On Water Footprint Theory

Water is the source of life,the foundation of production and ecology.At present,China's economic development and social progress is facing the dual constraints of water quality and quantity.How to carry out sustainable utilization of water resources and realize the coordinated development of water resources with economic society and ecological environment has become an urgent problem.Water footprint theory socializes water resources from the perspective of simple resource science to the field of economy and society.It provides a new way to explore sustainable development of water resources,This paper calculates water footprint and its characteristics in Jiangsu Province from 2005 to 2015 by applying the water footprint theory,and GM(1,1)is used to predict development trend in the next five years.In addition,AHP and entropy to calculate weights,and evaluates the level of water resource sustainable utilization in terms of water footprint structure,social benefit,economic benefit and ecological security by fuzzy comprehensive evaluation method.Finally this paper gives some innovative advices for water resources management from the aspects of water management,water system and economic,social,environment.The results are as follows:Firstly,the water footprint in Jiangsu Province is calculated.The water footprint in Jiangsu shows an inverted U-shaped curve in the study period,which is up to the highest in 2011,and then indicating a fast declining trend.The annual virtual water content of agricultural and livestock products is 95.21 billion m3,which is the highest proportion of total water footprint and 2.3 times as much as actual water consumption.The trend is rising.Industrial water is the second section of water footprint consumption.With significantly improved on water use efficiency,it showes a downward trend.Virtual water trade showed a trade surplus,in which industrial products are much higher than that of agricultural products.The virtual water import and export of industrial products were significantly decreased.Secondly,according to the "Inertia development" situation,the water footprint in 2020 will have a 0.92%decline compared with that in 2015.Thirdly,the situation of water resource sustainable utilization is analyzed.?Water shortage problem has improved slightly.Jiangsu can be self-sufficient in supply water resources,and the annual water footprint self-sufficiency rate is 88.1%.But the water footprint is far greater than the amount of available water resources.There are half of the 11 years in which water resources in Jiangsu Province are in a non sustainable state.However,the water resources utilization for two consecutive years showed a sustainable state in 2014 and 2015.?The overall level of social benefits of water resources is relatively high.Million tons of water footprint of population density increases year by year.Land density changes with the trend of water footprint,overall showing a good trend of increasing first and then decreasing.Waste water footprint rate is relatively stable,with the average waste rate of 6%.It shows a high level of cleaner production.?The utilization of water resources and economic development curve towards a sustainable track.Jiangsu Province is in a balanced position in the virtual water trade and trade pattern is stable.Jiansu Province belongs to the place of water resources output.Water footprint economic benefits not only continue to climb in 11 years,but also make great contributions to ease pressure on water resources in other areas.?The water resources security has been improved.The water shortage index and pressure index all exceed 100%,but have improved slightly since 2013 declining at a rate of 30%per year.With applying the strictest water resources control system,water use efficiency has improved,and the water resources utilization of Jiangsu presents a trend of sustainable development,but still be in a state of serious water shortageForthly,innovative advices for water resources management are gived.According to the conditions of Jiangsu Province,adhereing to life,production and ecology,we should innovate the system and mechanism of water resources management,optimize the structure and allocation of water resources system,coordinate the development of economic and industrial structure,promote the construction of new urbanization,and strengthen ecological environment protection and governance.