Spatial mapping of actual evapotranspiration and water deficit with MODIS products in the Songnen Plain, northeast China

2010 IEEE International Geoscience and Remote Sensing Symposium Pub Date : 2010-07-25 DOI:10.1109/IGARSS.2010.5651301

Lihong Zeng, K. Song, Bai Zhang, Zongming Wang

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引用次数: 2

Abstract

Analysis of spatial patterns of evapotranspiration (ET) and water deficit (WD) is significant in the evaluation of crop growth status and water use efficiency for the Songnen Plain, an important commodity grain product base of China. Spatial patterns of ET and WD in the Songnen Plain of 2008 growing season (from May to September) were mapped by using MODIS products and meteorological data. The results indicated that ET and WD exhibited obvious spatial variation and gradually increased from southwest to east and northeast. Total ET over the Songnen Plain during the 2008 growing season ranged from 182.7mm to 1002.4mm with the mean value of 591.1mm, and WD ranged from −163.0mm to 645.9mm with the mean value of 195.9mm. Average ET and WD for different land covers varied significantly, water-body and wetlands obtained the highest ET and WD values, while grassland got the lowest ET and WD values. Through this study, it would provide some supports for the assessment of crop growth in arid environments of Songnen Plain.

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基于MODIS产品的松嫩平原实际蒸散发和水分亏缺空间制图

作为中国重要的商品粮基地，分析松嫩平原作物蒸散发(ET)和水分亏缺(WD)的空间格局对评价作物生长状况和水分利用效率具有重要意义。利用MODIS产品和气象资料，绘制了松嫩平原2008年生长季(5 - 9月)ET和WD的空间格局。结果表明:ET和WD表现出明显的空间差异，由西南向东、东北逐渐增大;松嫩平原2008年生长季总ET在182.7 ~ 1002.4mm之间，平均值为591.1mm; WD在- 163.0 ~ 645.9mm之间，平均值为195.9mm。不同土地覆被的平均ET和WD差异显著，水体和湿地的ET和WD最高，草地的ET和WD最低。通过本研究，可为松嫩平原干旱环境下的作物生长评价提供一定的支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2010 IEEE International Geoscience and Remote Sensing Symposium

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