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首页> 外文会议>IEEE International Geoscience and Remote Sensing Symposium >Crop water productivity mapping using aster imagery for irrigated fields of Al-Kharj region in Eastern province of Saudi Arabia
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Crop water productivity mapping using aster imagery for irrigated fields of Al-Kharj region in Eastern province of Saudi Arabia

机译：沙特阿拉伯东部省Al-Kharj地区的灌溉田地使用aster影像进行作物水分生产率测绘

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摘要

Overwhelming emphasis of this study was to develop comprehensive sets of simplified methods and protocols for water productivity mapping (WPM) using high spatial resolution satellite images (ASTER), based on combination of crop classification, yield, and water use (actual evapotranspiration) computation for crops using thermal band data and surface energy balance models. The study used satellite images for the year 2012 and focused on Water Productivity Mapping (WPM) of wheat, alfalfa, corn and Rhodes grass fields under centre pivot sprinkler irrigated system at Todhia Arable Farm of the Al-Kharj region, in Eastern province of Saudi Arabia. Crop water productivity map (WPM) was generated for the whole farm by dividing the crop productivity map (CPM) with water use map (WUM). The water used by different crops varied considerably depending on the crop growing season in seasonal crops (wheat and corn) and the harvesting/cutting schedules in alfalfa and Rhodes grass, which are multi-cut crops. The highest water productivity (t/ha mm) was observed in corn (1.24), followed by Rhodes grass (0.55) wheat (0.4) and alfalfa (0.38).
机译：这项研究的压倒性重点是，根据作物分类，产量和用水量（实际蒸散量）的计算方法，使用高分辨率的卫星图像（ASTER）开发一套综合的简化方法和协议，用于水生产率测绘（WPM）。作物使用热能带数据和表面能平衡模型。这项研究使用了2012年的卫星图像，重点研究了沙特东部省Al-Kharj地区Todhia Arable Farm中心枢轴喷灌系统下小麦，苜蓿，玉米和Rhodes草地的水生产率图（WPM）阿拉伯。通过将农作物生产率图（CPM）除以用水量图（WUM），可以生成整个农场的农作物水分生产率图（WPM）。不同作物的用水量随季节作物（小麦和玉米）的作物生长季节以及苜蓿和罗得草的多茬作物的收获/切割时间表而有很大差异。在玉米（1.24）中观察到最高的水生产率（t / ha mm），其次是罗得草（0.55），小麦（0.4）和苜蓿（0.38）。

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