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沧州市土壤墒情变化规律简析

发表时间:2010-01-31  浏览量:2648  下载量:686
全部作者: 李春光,哈建强
作者单位: 河北省张家口水文局;河北省沧州水文局
摘 要: 依据捷地旱情试验站2003年至2006年监测资料,深入分析了沧州地区土壤墒情特点,研究了捷地试验站所代表区域(滨海平原区)的土壤墒情变化规律。依据实际观测资料,分析计算土壤消退系数k值,并求出逐月平均k值,建立退墒预报方案。通过绘制降雨量P~雨前土壤含水率θ0~雨后增墒Δθ相关图,得出增墒计算经验公式,建立了增墒预报方案。两方案经评定,其精度可以满足本地区墒情预报的要求。该墒情预报方案,对合理指导农作物实施灌溉,发展优质、高产、高效农业,合理利用水资源,保持农业生产持续稳定发展,具有重要的意义。
关 键 词: 环境水利;墒情预报;土壤消退系数k;降雨量P;雨前土壤含水率θ0;雨后增墒Δθ
Title: Brief analysis on soil moisture content change discipline of Cangzhou city
Author: LI Chunguang, HA Jianqiang
Organization: Zhangjiakou Hydrology Bureau, Zhangjiakou;Cangzhou Hydrology Bureau
Abstract: Based on the monitoring data of 2003~2006 in Jiedi drought experimental station, the paper thoroughly analyzes the soil moisture content characteristics, and studies the soil moisture content change discipline of the area (Binhai plain area) represented by the Jiedi drought experimental station. The paper used observed data to analyze and calculate the values of soil depletion coefficient k, and monthly average k, and establishes a soil moisture depletion forecast scheme. A correlation diagram of rainfall amount P~soil moisture content before rain θ0~soil moisture increase after rain Δθ was made to obtain a empirical formula of soil moisture increase calculation, so as to establish a soil moisture increase forecast scheme. The two plans were assessed, and the results showed that their accuracy could meet the requirement of forecasting the soil moisture content. This soil moisture content forecast scheme has vital significance for reasonably directing crop irrigation, developing agriculture with high quality, high production and high effect, reasonably using water resource, and maintaining continues the steady development of agricultural production.
Key words: environmental bydraulics; soil moisture content forecast; soil depletion coefficient k; rainfall amount P; soil moisture content before rain θ0; soil moisture increase after rain Δθ
发表期数: 2010年1月第2期
引用格式: 李春光,哈建强. 沧州市土壤墒情变化规律简析[J]. 中国科技论文在线精品论文,2010,3(2):196-203.
 
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