基于Morris的InVEST模型淡水模块参数敏感性分析

Sensitivity analysis of each parameter for freshwater module in InVEST model based on Morris method

选取InVEST模型淡水模块为研究对象,利用Morris法对淡水模块中产水、水土保持、水质净化3种功能评估进行各参数的敏感性分析.结果表明:年降水量、年潜在蒸散量、植被蒸散系数是影响产水功能的3个重要参数;降水侵蚀力、土壤可蚀性是影响水土保持功能的2个重要参数;营养物去除系数、降水量、校准参数是影响水质净化功能的3个重要参数,该研究可以明晰InVEST模型不确定性,为模型应用与改进提供科学参考.

Taking freshwater module of InVEST model as the research object,the sensitivity of each parameter for water yield,soil and water conservation,and water purification function in freshwater module was analyzed by the method of Morris.Results showed that annual precipitation,annual potential evapotranspiration and vegetation evapotranspiration coefficient are three important parameters affecting water yield.Precipitation erosivity and soil erodibility are two important parameters influencing soil and water conservation function.Nutrient removal coefficient,precipitation and calibration parameters are three important parameters that affect water purification function.This study could clarify the uncertainty of InVEST model and provide scientific reference for model application and improvement.