基于DEM的辽宁乡镇渍涝预报

中国农业气象

基于DEM的辽宁乡镇渍涝预报

陆忠艳;袁子鹏;陈艳秋;孙欣;

沈阳中心气象台;

出版日期:2008-08-10 发布日期:2008-08-10
基金资助:
辽宁省气象台业务开发基金

Waterlog Forecast at Villages and Towns Level in Liaoning Province Based on DEM

LU Zhong-yan,YUAN Zi-peng,CHEN Yan-qiu,SUN Xin(Shenyang Central Meteorological Observatory,Shenyang 110016,China)

Online:2008-08-10 Published:2008-08-10

摘要/Abstract

摘要： 为满足天气预报中对渍涝灾害预报的要求,利用辽宁省1:25万DEM基本地形数据,以G IS为平台分析研究区域的水流方向和汇流能力栅格;对SCS(Soil Conservation Service)-Curve Number径流预报模型进行本地化调试,应用辽宁省乡镇降水量预报和汇流能力栅格,通过耦合得到实际地形的汇流量;根据汇流量和渍涝等级对应关系发布辽宁省乡镇级别的渍涝风险气象等级预报,并在一次天气过程中进行试报,预报结果和实况基本吻合。

关键词: DEM, 水流方向, 汇流能力, SCS水文模型, 渍涝预报

Abstract: To meet the requirements for waterlog forecast in the weather forecast,the waterlog occurrences at villages and towns level in Liaoning Province based on DEM were forecasted.The directions of water flow and convergence capacity grids were analyzed by using the basic topographic data of the 1:250000 scale DEM for Liaoning Province,based on geographic information system(GIS) platform.The Soil Conservation Service-Curve Number(SCS) hydrology model was debugged.The actual terrain runoff was obtained by coupling the runoff model with the converge ability.According to the corresponding relationship between converge and waterlog grade,the meteorological waterlog risk grade was gained.The waterlog occurrence was forecasted in a weather process.The forecasted results were consistent to the actual happening.

Key words: DEM, DEM, Flow direction, Converge ability, SCS hydrology model, Waterlog forecast

陆忠艳;袁子鹏;陈艳秋;孙欣;. 基于DEM的辽宁乡镇渍涝预报[J]. 中国农业气象.

LU Zhong-yan,YUAN Zi-peng,CHEN Yan-qiu,SUN Xin(Shenyang Central Meteorological Observatory,Shenyang 110016,China). Waterlog Forecast at Villages and Towns Level in Liaoning Province Based on DEM[J]. Chinese Journal of Agrometeorology.

[1]	张山清，普宗朝. 基于DEM的乌鲁木齐河流域降水量时空变化分析[J]. 中国农业气象, 2011, 32(3): 437-443.
[2]	谢云峰;张树文;. 基于数字高程模型的复杂地形下的黑龙江平均气温空间插值[J]. 中国农业气象, 2007, 28(02): 205-211.