WaSSI-C模型在焉耆盆地的适用性改进与应用  

Applicability improvement and application of WaSSI-C model in Yanqi Basin

作　　者：侯晓臣 孙伟[1] 李建贵 李全胜[1] HOU Xiao-chen;SUN Wei;LI Jian-gui;LI Quan-sheng(College of Computer and Information Engineering,Xinjiang Agricultural University,Urumchi 830052,China;Institute of Forestry,Xinjiang Agricultural University,Urumchi 830052,China)

机构地区：[1]新疆农业大学计算机与信息工程学院,新疆乌鲁木齐830052 [2]新疆农业大学林业研究所,新疆乌鲁木齐830052

出　　处：《甘肃农业大学学报》2019年第3期108-116,共9页Journal of Gansu Agricultural University

基　　金：国家林业局引进国际先进林业科学技术项目(948项目);新疆维吾尔自治区教育厅高校科研计划科学研究重点项目(XJEDU2016I025)

摘　　要：【目的】为缓解干旱区日益突出的水碳矛盾,进而为其水碳资源综合管理提供有效的工具和决策支持.【方法】选取典型干旱区焉耆盆地为研究对象,基于WaSSI-C模型(water supply stress index-carbon model)的理论框架和运行机理,针对研究区的自然地理和环境特征,增加冰川融化计算模块,对WaSSI-C模型进行适用性改进.以2000~2009年作为率定期,2010~2015年作为验证期,对研究区实测径流、MODIS蒸散(ET)和总生态系统生产力( GEP )数据进行统计分析,利用决定系数(R^2)和效率系数(NS)评价模型的模拟精度,应用GIS空间分析技术探讨研究区水碳资源的空间分布特征.【结果】 1)研究区率定期和验证期总径流对比验证的R^2分别为0.80 和0.77 , NS为0.77和0.69;ET对比验证R^2分别为0.82和0.79, NS为0.80和0.76;GEP 对比验证R^2分别为0.88和0.84 , NS分别为0.87和0.82;2)径流空间分布呈现“西高东低、北高南低”的特点;ET和GEP 均呈现“中间高,四周低”的特点.【结论】改进后的WaSSI-C模型在焉耆盆地具有良好的适用性,且模拟结果显示焉耆盆地的水碳资源具有明显的空间异质分布特征.【Objective】 In order to alleviate the increasingly prominent contradiction between water and carbon in arid areas,and provide effective tools and decision support for integrated management of water and carbon resources.【Method】 Yanqi Basin,a typical arid region,was selected as the research site.Based on the theoretical framework and operating mechanism of the WaSSI-C (water supply stress index-carbon model) model,the module for calculating the melt of glaciers was added to improve the applicability of the model according to the characters of natural geography and the environment in the study area.The data of measured runoff,evapotranspiration (ET) and total ecosystem productivity (GEP) of MODIS in the study area from 2000 to 2009 were analyzed as the calibration period and the data from 2010 to 2015 were used as the validation period.The precision of the simulation of the model was evaluated by using the coefficient of determination (R^2) and the efficiency coefficient (NS).The spatial distribution characteristics of resources of water and carbon were analyzed by using the technique of GIS Spatial Analysis.【Result】 The R^2 of calibration and verification period for the total runoff in the study area were 0.80 and 0.77 respectively,and NS was 0.77 and 0.69 respectively;The R^2 for ET were 0.82 and 0.79 respectively, NS was 0.80 and 0.76 respectively;The R^2 for GEP were 0.88 and 0.84, NS were 0.87 and 0.82.The characteristics of the spatial distribution of runoff were higher in west and north parts than in east and south parts.The characteristics of the spatial distribution of ET and GEP were higher in middle area than the around area.【Conclusion】 It could be concluded that the improved WaSSI-C model had an excellent applicability in Yanqi Basin.And the simulation results showed that the water and carbon resources in Yanqi basin were obvious spatial heterogeneity.

关 键 词：WaSSI-C模型 焉耆盆地 水碳耦合 空间分布 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]