| 基于DEM的作物需水量估算方法 |
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| 引用本文： | 王景雷,孙景生,周祖昊,张寄阳.基于DEM的作物需水量估算方法[J].灌溉排水学报,2005,24(5):36-38. |
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| 作者姓名： | 王景雷 孙景生 周祖昊 张寄阳 |
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| 作者单位： | [1]水利部农田灌溉研究所,河南新乡453003 [2]中国水利水电科学研究院水资源研究所,北京100044 |
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| 基金项目： | 国家“863“计划(2002AA2Z4031),国家粮食丰产科技工程(2004BA520A06W9),农业部资源遥感与数字农业重点开放试验室开放课题联合资助 |
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| 摘 要： | 以ARCG IS8.3为技术平台,以“全国灌溉试验数据库”为主要数据源,以DEM为基础,通过ARCG IS的空间分析工具获取经度、纬度、海拔高度、坡度、坡向和遮蔽度等主要地形因子。在分析山东省冬小麦需水量与主要地形因子之间关系的基础上,利用趋势面分析方法建立了冬小麦需水量空间分布的数学模型,生成了山东省冬小麦需水量栅格图,所得结果与当地冬小麦实际用水分布状况较为吻合。
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| 关 键 词： | GIS DEM 地形因子 需水量 冬小麦 |
| 文章编号： | 1000-646X(2005)05-0036-03 |
| 修稿时间： | 2005年8月2日 |
A Method for Evaluation Crop Water Requirements Based on Digital Elevation Model (DEM) |
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| WANG Jing-lei,SUN Jing-sheng,ZHOU Zu-hao,ZHANG Ji-yang.A Method for Evaluation Crop Water Requirements Based on Digital Elevation Model (DEM)[J].Journal of Irrigation and Drainage,2005,24(5):36-38. |
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| Authors: | WANG Jing-lei SUN Jing-sheng ZHOU Zu-hao ZHANG Ji-yang |
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| Institution: | WANG Jing-lei~1,SUN Jing-sheng~1,ZHOU Zu-hao~2,ZHANG Ji-yang~1 |
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| Abstract: | By employing geographic information software ArcGIS8.3 and 1 km×1 km DEM,1 km×1 km database in aspects of longitude,latitude,altitude,slope were established.Using "Database of National Irrigation Experimental Materials" and climate data from 1951 to 2003,the annual data of water requirement was confirmed.The relation between water requirement of winter wheat and main topographic factor were analyzed.On the base of the work,the spatial distribution model for crop water requirement was established in terms of different geographical dimensions as longitude,latitude,altitude,slope and aspect by using trend-surface analysis.Finally,the grid information system of winter wheat water requirement Shandong province in China was established.The evaluation data matches well with the experimental data observed. |
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| Keywords: | GIS DEM topographic factor water requirements winter wheat |
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