基于遥感的塔布河流域蒸散发时空变化分析  

Temporal and Spatial Variation Analysis of Evapotranspiration in Tabu River Basin Based on Remote Sensing

作　　者：梁文涛 尹航[1,2] 韩振华 张燕飞[1,2] 张鹏[4] LIANG Wentao;YIN Hang;HAN Zhenhua;ZHANG Yanfei;ZHANG Peng(Yinshanbeilu National Field Research Station of Desert Steppe Eco-hydrological System,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Institute of Water Resources for Pastoral Area,Hohhot 010020,China;School of Ecology and Environment,Inner Mongolia University,Hohhot 010021,China;Hydrological Survey Bureau of Ordos City of Inner Mongolia,Kangbashi 017020,China)

机构地区：[1]中国水利水电科学研究院/内蒙古阴山北麓荒漠草原生态水文野外科学观测研究站,北京100038 [2]水利部牧区水利科学研究所,呼和浩特010020 [3]内蒙古大学生态与环境学院,呼和浩特010021 [4]内蒙古自治区鄂尔多斯水文勘测局,康巴什017020

出　　处：《内蒙古农业大学学报（自然科学版）》2022年第1期27-34,共8页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：中国水科院专项基金项目(MK2019J08);内蒙古自治区自然科学基金项目(41807215)。

摘　　要：蒸散发(ET)的准确估算是水资源合理开发利用以及生态建设中关键一环,在干旱半干旱等缺水地区尤为重要。本研究采用SEBAL模型(The Surface Energy Balance Algorithm for Land),估算了塔布河流域2018年生长季ET值,结合土地利用类型分析了研究区地表参数以及ET时空变化特征,并对引起ET时空变化的影响因子进行分析,得到以下结论:使用实测数据与SEBAL模型的模拟值进行对比验证,二者均方根误差为1.55 mm,R;为0.89,SEBAL模型精度较高,表明该模型可以为研究区提供较为准确的ET值;ET在时间上呈现出4月—5月上升、6月略有降低、7月达到最高、8月—10月下降的变化趋势;空间上ET主要呈现出林地、农田与高覆盖度草地较高,其他土地类型较低的空间分布情况,并且在生长季植被茂盛地区ET波动更大;水文要素(降水、气温等)是影响ET时空分布的主要因素,此外由NDVI反映出的植被生长状况也是影响ET主要因素之一。Accurate assessment of the evapotranspiration(ET),as a key link in the rational development and utilization of water resources and ecological construction,is particularly important in the arid and semiarid regions with water shortages. In this study,the SEBAL model(The Surface Energy Balance Algorithm for Land)was used to estimate ET values of the Tabu River Basin in the growing season in 2018,and the meteorological observation data were used as the auxiliary data to analyze the surface parameters and the temporal and spatial variation characteristics of ET in the study area combined with the land use types. And the influencing factors causing the temporal and spatial changes of ET were analyzed as well. The measured data and the simulated value of the SEBAL model were used for comparison and verification. The results showed that the RMSE of the measured and simulated values was 1. 55 mm,and the R;value was 0. 89,indicating the model had a high accuracy and could provide relatively accurate ET values for this study area. In terms of time,the ET value showed an increasing trend from April to May,slightly decreasing in June,reaching the highest in July,and decreasing from August to October. Spatially,the ET mainly presented higher levels of woodland,farmland,and highcoverage grassland,lower levels of other land types,and the ET values fluctuated more in the areas with lush vegetation in the growing season. The hydrological elements(precipitation,air temperature,etc.)were the main factors affecting the temporal and spatial distribution of the ET. In addition,the vegetation growth status reflected by the NDVI was also one of the main factors affecting the ET.

关 键 词：蒸散发 SEBAL模型 土地利用类型 时空分布 

分 类 号：Q148[生物学—生态学] TV882.8[生物学—普通生物学]