Decoupling analysis of agricultural non-point source pollution and agricultural output in nine provinces of the Yellow River basin
The discharge of chemical oxygen demand,total N,and total P from agricultural sources in nine provinces of the Yellow River basin was measured from 1978 to 2021 based on the inventory analysis method to explore the relationship between agricultural non-point pollution and agricultural output value in nine provinces of the Yellow River basin,and the decoupling relationship between agricultural non-point pollution and agricultural output value and its spatio-temporal evolution process was investigated using Tapio evaluation model.The results showed that agricultural non-point source pollution discharges and agricultural output value in nine provinces of the Yellow River basin showed an increasing trend from 1978 to 2021,and the structure of agricultural pollution sources and the structure of agricultural output value showed significant changes.The elastic decoupling status between agricultural non-point source pollution discharges and agricultural output values showed fluctuating changes and was dominated by weak decoupling status,with significant spatial variability.Changes in decoupling status were influenced by multiple factors such as national policies,natural ecology,economic level,and people′s demand,among others.Future high-quality development of agriculture in the nine provinces of the Yellow River basin should adopt differentiated watershed and sectoral control measures.
国家科技期刊平台
NSTL
万方数据
