摘要
本文引入土壤有效降水和土壤准耗散概念,把不同强度的日降水量按土壤可利用程度划分为9个等级,建立逐日有效降水、旬平均无有效水分来源下的土层贮水变化量(土壤准耗散)和土壤日耗散计算模型。并基于土壤逐日贮水量动态变化模型和土壤墒情指数,实时估算土壤湿度变化,进而利用加密自动气象站逐日降水量资料动态监测区域水分的盈亏和旱涝变化。研究结果可为自动站资料的应用、土壤墒情监测和干旱预警提供新的思路和方法。
The concept of soil effective precipitation and soil quasi-evapotranspiration was introduced in this paper.The 9 grades of precipitation were determined according to water efficiency.Models of effective precipitation,ten-day period water change storing soil and soil water evapotranspiration were established.According to the models and index of soil moisture,soil moisture change in real-time was estimated.Further using every day precipitation of automatic weather station,the profit and loss of soil water and the changes of droughts and floods were observed in movement.The results provided a new ideas and methods for using the data of automatic weather station,observing soil moisture and droughts forecast.
出处
《中国农业气象》
CSCD
2009年第S2期230-232,234,共4页
Chinese Journal of Agrometeorology
关键词
自动站
有效降水
土壤准耗散
土壤墒情监测
Automatic weather station
Effective precipitation
Soil standard evapotranspiration
Soil moisture content monitoring
