摘要
[目的]估算2001—2013年开孔河流域净初级生产力(NPP),并分析其时空分布特征和未来变化趋势,为自然资源的管理和有效利用提供依据。[方法]基于MODIS植被指数(NDVI)产品数据、气象数据和植被分类数据,利用改进的CASA模型。[结果]2001—2013年开孔河流域年均NPP呈逐渐增长趋势;空间上表现为西北高、东南低的特征,以开孔河为高值中心呈带状分布;NPP年内变化较大,夏季最高,占全年的65.30%,冬季仅有2.13%,为各季最低;Hurst指数与Slope趋势空间耦合图表明流域内未来NPP将呈增长趋势。[结论]开孔河流域生态环境呈良性发展的态势且季节差异明显、区域差异明显。
[Objective] The paper estimates the net primary productivity(NPP) of the Kaidu-Kongque river basin, and analyzes its spatial and temporal distribution characteristics and the future tendency, in order to provide the basis for the management and effective use of natural resources.[Methods] MODIS vegetation index(NDVI) data, meteorological and vegetation classification data was collected from 2001 to 2013. The improved CASA model was used.[Results] The annual NPP showed a gradually increasing trend, and it was high in northwest but low in southeast. The NPP values showed a zonal distribution with Kiadu-Kongque river as the center(highest NPP value). The annual variation of NPP was great, the highest NPP occurred in summer(65.30%) while the lowest NPP occurred in winter (2.13%). From the Hurst index and slope trend of NPP spatial coupling graph, an increasing trend in NPP could be expected in the future.[Conclusion] The development of ecological environment in the Kaidu-Kongque river basin is sustainable, and the seasonal and regional difference is obvious.
出处
《水土保持通报》
CSCD
2016年第5期220-224,230,F0002,共7页
Bulletin of Soil and Water Conservation
基金
新疆维吾尔自治区科研创新项目"干旱区内陆河流域融雪性洪水演进及三维可视化研究"(XJGRI2015044)
国家自然科学基金项目"变化环境下内陆河流域水资源承载力与绿洲扩张风险研究"(51569027)
"天山中段非均匀下垫面雪水当量被动微波遥感研究"(41371419)