衡水市土壤墒情变化规律及预报分析

依据衡水水文实验站2010-2012年土壤含水率观测资料,分析衡水地区土壤墒情特点,研究代表区域的土壤墒情变化规律。利用实际观测资料,分析计算土壤消退系数K值,并拟合增墒计算经验公式,建立了退墒及增墒预报方案,并利用2013年资料进行了验证,经评定,两方案的预报精度均达100%,达到甲级预报标准。对合理指导农作物实施灌溉,保障农业生产,具有重要的意义。

Variation Regularity of Soil Moisture and Forecast Analysis in Hengshui city

According to the observation data of soil moisture content of the Hengshui hydrological station in 2010 - 2012, analyzing of soil moisture characteristics of Hengshui, researching on the change law of soil moisture of the representative area. Using actual observation data, analyzing and calculating the value of soil recession coefficient K, and fitting the in-crease quantity into calculating the empirical formula, established the forecast plan of refund quantity and increase quanti-ty, and using the data of 2013 verified it. According to the evaluation？of both plans, the prediction accuracy is 100%, and reaching grade A standard. It has a vital significance for guiding reasonable implementation of crop irrigation and ensuring agricultural production.