Evaluation of the Loss Degree of Agricultural Water Resources Eco-Economic System Based on the Negative Benefit of Water Use
In the process of agricultural water use,the negative benefits of water supply,water consumption,drainage and pollution collec-tion will cause certain losses to the ecological economic system of agricultural water resources and then affect the sustainability of the system.Based on the negative benefits of the output of each link in the process of agricultural water consumption,this paper built an evaluation index system of loss degree of agricultural water resources eco-economic system.The economic loss rate,social instability rate and ecological load rate were used as indicators and the system loss rate was used as a comprehensive indicator.The energy method and AHP analytic hierarchy process were used to quantify the loss status and development trend of agricultural eco-economic system in Zhengzhou City from 2012 to 2017.The results show that during the study period,the economic loss rate of the agricultural eco-economic system in Zhengzhou is maintained at about 0.25%in 2012 to 2016,rising to 0.29%in 2017.The social instability rate is decreased from 21.46%in 2012 to 7.04%in 2017.The ecological load rate is basically stable at 11.7%,rising to 13.7%in 2017.The system loss is mainly affected by social instability rate and ec-ological load rate.The loss degree of the system as a whole shows a downward trend,from mild unsustainable to critical unsustainable and gradually tends to a benign development.
ecological-economic system of water resourceslossnegative benefitZhengzhou City
国家科技期刊平台
NSTL
万方数据
