摘要
采用空间分辨率为8 km×8 km、时间分辨率为15 d的美国航空航天局(NASA)全球监测与模型研究组发布的卫星GIMMS/NDVI数据,反演了褒河流域叶面积指数(LAI)的空间分布,引入基于LAI的Penman-Monteith模型,模拟了褒河流域蒸散发能力的时空分布,分析比较了不同植被覆盖下蒸散发能力的变化规律。结果表明:褒河流域植被蒸腾作用强于土壤蒸发,并且不同的植被覆盖对蒸散发能力的大小和时间分布有着显著的影响。
The distribution of LAI within the Baohe Catchment was derived from GIMMS/NDVI published by global inventory modeling and mapping studies of NASA with the spatial resolution of 8 km by 8 km,temporal resolution of 15 d.The distribution of potential evapotranspiration within the studied area was simulated by the Penman-Monteith model based on LAI,which calculated the vegetation transpiration and soil evaporation separately.The results show that vegetation transpiration is more than soil evaporation in the studied area and the different vegetation coverages have significant influence on evapotran piration and time distribution of the potential evapotranspiration.
出处
《人民黄河》
CAS
北大核心
2012年第7期33-35,共3页
Yellow River
