甘肃省农业干旱动态监测指标的确定及其应用  

Determination and application of the dynamic drought-monitoring indexes for agriculture in Gansu province

作　　者：陈雷[1] 杨兴国[2] 把多辉 薛生梁 

机构地区：[1]甘肃省武威市气象局 [2]中国气象局兰州干旱气象研究所,甘肃兰州730020

出　　处：《干旱地区农业研究》2005年第1期144-148,156,共6页Agricultural Research in the Arid Areas

基　　金：兰州区域气象中心开放实验室"干旱气象监测试验研究"项目

摘　　要：用降水量、灌溉量、蒸发量、前期土壤湿度等因素建立计算武威、定西、西峰、成县四个代表站0～50cm土壤总含水量模拟递推方程,计算逐旬土壤湿度,根据不同气候区各旱涝级别的指标值,判断农业干旱的发生发展过程。结果表明,该模型能较准确地监测出甘肃省不同气候区农业干旱的动态变化趋势,效果良好,用土壤含水量能较准确地反映农业的旱涝状况。Based on the comparisons among agricultural indexes in common use and the analysis of measured data of agricultural drought in the various climatic regions in Gansu province, it was found that soil moisture indexes could reliably express the agricultural flood/drought. It was simulated by using precipitation, irrigation freguency, evaporation and previous soil moisture etc. Total soil moistures from 0 to 50 cm of four representative stations—Wuwei, Dingxi, Xifeng, Chengxian were simulated, and corresponding dynamic equations were established, ten-day soil moisture was calculated one by one, and process of drought was analysized according to the level of flood/drought in the various climatic regions. Results showed that the models could reliably monitor the dynamic changing trend of drought for agriculture of the various climatic zones in Gansu province.

关 键 词：干旱 土壤湿度 灌溉量 土壤含水量 农业 定西 甘肃 指标 成县 武威 

分 类 号：S152[农业科学—土壤学] S423[农业科学—农业基础科学]