基于GIS的广东干旱逐日动态模拟与评估 |
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| 出 版 社：华南农业大学学报 |
| 发表时间：2006 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：王春林，董永春，李春梅，黄珍珠，何健 |
| 点 击 率：4403 |
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| 关 键 字：干旱；干旱指数；地理订正；GIS技术；动态监测 |
| 摘 要：参考帕默尔(Pahner)旱度模式中土壤水分平衡概念，提出以逐日气温和降水资料，逐日滚动模拟土壤有效水分，并以下层土壤有效含水量构建干旱强度动态指数(DDI)．借助GIS技术和包括经度、纬度、海拔、坡度、坡向5个环境因子的地理订正模型，对离散DDI资料进行1 km空间分辨率的精细化反演，能够清晰刻画地形、地貌对干旱程度空间分布的影响．结合土地利用信息，开发业务系统，实现对广东干旱发生、发展及其强度、范围的实时动态监测和评估，为选择合适的时机和地点开展人工增雨作业提供指挥决策依据，并对作业效果进行定量评估． |
| 关 键 字(英文)：drought；drought index；geographic corection；GIS technique；dynamic watching |
| 摘 要(英文)：According to the concept of soil-moisture-balance in Palmer-drought-model，daily drought index(DDI)is defined by available water content(AWC)below level soil．AWC was simulated day by day using daily data of temperature an d rainfal1． Based on GIS technique and geographic correction model with 5 environmental factors of longitude，latitude，height above the level，grade an d slope of terrain，
drought spatial distribution with relative hi gh resolution of 1 km was made from scatter data of DDI of 86 stations．which could reflect the efect of terrain factors to drought distribution with more detail．Corn-bined land data，aIl operation system was developed to monitor and evaluate the occurrence．develop—ment，severity degree and distribution of the drought dynamically，and to provide decision—making and evaluation for manmade-rainfall operation． |
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 基于GIS的广东干旱逐日动态模拟与评估_2006 华南农业大学学报 王春林.pdf |
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