基于InVEST模型的太行山淇河流域土壤保持功能研究  

The Function of Soil Conservation on Taihang Mountain Qihe River Basin Based on InVEST Model

作　　者：何莎莎[1] 朱文博[1] 张静静[1] 叶露培 朱连奇[1] 冯小燕 HE Shasha;ZHU Wenbo;ZHANG Jingjing;YE Lupei;ZHU Lianqi;FENG Xiaoyan(College of Environment and Planning,Henan University,Henan Kaifeng 475004,China)

机构地区：[1]河南大学环境与规划学院,河南开封475004

出　　处：《河南大学学报（自然科学版）》2018年第5期542-553,共12页Journal of Henan University:Natural Science

基　　金：国家重点基础研究发展计划项目(973计划)(2015CB452702);国家自然科学基金项目(41671090;41401504)

摘　　要：山地生态系统的土壤保持服务对评估山区生态环境质量非常重要.基于2000-2015年4期土地利用数据,借助InVEST模型对淇河流域山地生态系统的土壤保持状况进行研究.结果表明:(1)2000-2015年淇河流域土壤保持强度明显降低,2000年单位土壤保持量为644.55t/(hm2·a),2015年则降低至277.06t/(hm2·a).(2)林地土壤保持强度最大,是研究区土壤保持总量最高的土地利用类型.耕地土壤保持强度远小于林地和草地.(3)土壤保持强度随海拔增加呈现先增后减,保持强度最大的是1 000~1 200m区域,高达557.95t/(hm2·a),最小的是小于200m区域,低至20.00t/(hm2·a).土壤保持强度随坡度和起伏度的增加而增大,土壤保持量主要分布在坡度介于15~35°和起伏度介于70~500m的区域.因此,根据土壤保持特征的地形差异和土地利用类型差异,可以得出下一步实施水土保持措施的重点区域.水土流失是山地生态脆弱性响应的重要指标,山地流域的土壤保持功能研究对评估区域生态环境质量有重要意义.Soil conservation service in mountain ecosystems is very important for evaluating the quality of mountain eco-environment.Based on the 2000-2015 four period land use data,the soil conservation of mountain ecosystem was studied with the InVEST model on Qihe river basin from 2000-2015.The results show that：（1）Soil conservation services refer to the reduction and improvement of soil erosion by the ecosystem.The soil conservation intensity was obviously reduced on Qihe river basin from 2000-2015.The unit quantity of soil conservation was644.55 t/（hm^2·a）in 2000,reduced to 277.06 t/（hm^2·a）in 2015.（2）The soil conservation intensity of forest land is the largest,and the total amount of soil conservation in forest land is the highest among all land use types.The soil conservation intensity of cultivated land is far less than those of the forest land and grassland.（3）The soil retention strength is increased first and then decreased with increasing altitude,and the strength of 1 000-1 200 m area was the biggest with 557.95 t/（hm^2·a）.Soil conservation intensity increases with the slope and relief,and soil conservation amount was mainly distributed in the slope between 15-35°and the relief between the 70-500 marea,The amount of unit soil conservation in the region was large.Based on the differences of soil retention characteristics and land use types,the key areas for implementing soil and water conservation measures in the next stage can be concluded.Soil and water loss is an important indicator of mountain ecosystem vulnerability.The study of soil conservation function in mountainous Watershed is of great significance for assessing the quality of regional ecoenvironment.

关 键 词：土壤保持 InVEST模型 淇河流域 土地利用 生态系统 

分 类 号：S157[农业科学—土壤学]