摘要
采用定量指标法和模型法研究了青海省水源涵养、生物多样性、土壤保持、防风固沙生态服务功能。不同模型下的服务功能利用GIS进行空间叠加处理,得到青海省生态系统服务总值。对青海省净初级生产力(NPP)分析发现,水、光、热条件较好的区域植被覆盖较好,而定量指标法评价因子少、相关数据易获取,但是评价结果只是定性分析;模型法评价因子多、相关数据不易获取,但是评价结果为定量分析、极小区域评价与实际相符。基于两种模型的特点,本文采用"定量指标法"得出防风固沙功能评价数据与"模型法"得出的水源涵养、土壤保持功能评价数据进行叠加分析,即"综合法"。该方法较为客观地评价了青海省生态服务功能,也为下一步青海省生态保护红线的划定提供了有力的科学依据。
In this paper,the quantitative index method and model method were used to study the water conservation,biodiversity,soil conservation and windbreak and sediment conservation ecological service functions in Qinghai Province. The service function of different models uses GIS to carry on the spatial superposition processing,and obtain the total value of ecosystem services in Qinghai Province. According to the analysis of the net primary productivity（ NPP） in Qinghai Province,it is found that the vegetation cover with good water,light and thermal conditions is better,and the quantitative index method has few evaluation factors. The relevant data are easy to obtain,but the evaluation result is only qualitative analysis. Factor,the relevant data should not be obtained,but the evaluation results for the quantitative analysis,very small area evaluation and actual match. Based on the characteristics of the two models,this paper uses the ＂ quantitative index method＂ to obtain the evaluation data of windbreak and sand fixation function and the comprehensive analysis of water conservation and soil conservation function evaluation data obtained by ＂ model method＂. This method is more objective to evaluate the ecological service function of Qinghai Province,and also provides a strong scientific basis for the next step in Qinghai province ecological red line.
作者
张紫萍
唐文家
张志军
宋国富
张莉
ZHANG Ziping;TANG Wenjia;ZHANG Zhijun;SONG Guofu;ZHANG Li(Qinghai Ecosystem Remote Sensing Monitoring Center,Qinghai 810001,China)
出处
《测绘与空间地理信息》
2018年第7期34-38,共5页
Geomatics & Spatial Information Technology
基金
国家自然科学基金--多时相多极化SAR高原湿地关键水文和植被参数遥感反演研究项目(41571328)资助
关键词
生态服务功能评价
模型法
定量指标法
净初级生产力
ecological service tunction evaluation
model method
quantitative index method
net primary productivity
