基于生态系统服务的南四湖流域水环境管理分析

Analysis of Water Environment Management in Nansi Lake Basin Based on Ecosystem Services

摘要:

以南四湖流域为主要研究对象, 探讨生态系统服务在水环境管理中的权衡关系并明确驱动机制。基于2010—2025年作物供给、水质净化等特征,运用相关性分析和偏最小二乘回归模型,精准识别出农作物播种面积、农业机械动力、化肥施用量为影响水质净化服务的核心因子。通过K-means空间聚类方法,将流域划分为农产品主产区、生态涵养区、水质安全区3类功能区,分析不同区域在农业发展和生态保护间的优先级差异。研究进一步发现,作物供给和水质净化之间存在显著消极权衡,需要通过跨部门协同、分区管控优化种植结构、施肥方式,全面提高水环境质量,为流域尺度上生态系统服务的整合调控提供科学依据。

Abstract:

Taking the Nansi Lake Basin as the research object, this paper discusses trade-off relationships and driving mechanisms of ecosystem services in water environment management. Based on crop supply and water purification data from 2010 to 2025, correlation analysis and partial least squares regression model are adopted. Sown crop area, agricultural machinery power and fertilizer application rate are identified as core factors affecting water purification service. The basin is divided into 3 different functional zones, such as major agricultural production area, ecological conservation area and water quality safety area, by K-means spatial clustering, and priority differences between agricultural development and ecological protection in the 3 different zones are analyzed. A significant negative trade-off exists between crop supply and water purification. Cross-departmental coordination, zoned regulation, optimized planting structure and fertilization patterns shall be adopted to enhance water environment quality, providing scientific support for integrated regulation of ecosystem services at basin scale.