| 摘要: |
| 【目的】准确估算黑河流域中游地区植被生态耗水量，为流域生态保护和水资源配置提供科学参考。【方法】借助卫星遥感、GIS等技术，利用2011年5－9月黑河中游地区的归一化植被指数(INDV)数据，将其与同期土地覆被和气象数据相结合，采用植被指数法对黑河中游地区植被生长季的生态耗水量进行计算和分析，利用2008年同地同期数据资料进行检验。【结果】黑河中游地区林地蒸散发量214.2~343.9 mm，草地蒸散发量为213.1~269.8 mm；区域植被生态耗水量为5.812 8亿m3，其中林地生态耗水量为0.474 2亿m3，草地生态耗水量为5.338 6亿m3，计算结果与地面观测数据较为一致。【结论】用植被指数法估算植被生态耗水量比较简易、准确、可靠，在干旱地区生态研究中具有适用性。 |
| 关键词: 归一化植被指数(INDV) 黑河流域 植被 生态耗水量 |
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| 基金项目:国家自然科学基金项目（91425302，51279166） |
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| Estimation of vegetation ecological water consumption in the middle reaches of Heihe River basin based on INDV |
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MA Xinyi,SU Xiaoling,ZHANG Gengxi
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| Abstract: |
| 【Objective】The vegetation ecological water consumption in the middle reaches of Heihe River was estimated to provide scientific reference for the ecological protection and water resources allocation.【Method】Based on the vegetation index (VI) in combination with the contemporaneous land cover types and meteorological data,this paper selected the normalized difference vegetation index (INDV) for May to September 2011 to estimate the ecological water consumption of vegetation throughout growing periods in the middle reaches of the Heihe River basin.The statistics in 2008 were used to verify the results.【Result】The forest evapotranspiration during the study period was 214.2－343.9 mm,and the grassland evapotranspiration was 213.1-269.8 mm.The total vegetation ecological water consumption was 581.28 million m3,among which the forest and grassland ecological water consumptions were 47.42 million m3 and 533.86 million m3,respectively.The results were basically consistent with ground observation data.【Conclusion】Using the VI method to estimate vegetation ecological consumption is relatively simple,accurate and reliable.It has wide applicability for ecological research in arid areas. |
| Key words: normalized difference vegetation index (INDV) Heihe River basin vegetation ecological water consumption |
