| 江西省土壤体积含水量对降水的响应特征 |
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| 引用本文： | 袁正国,赖 亮,徐全倩.江西省土壤体积含水量对降水的响应特征[J].气象与减灾研究,2021,44(2):141-146. |
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| 作者姓名： | 袁正国 赖 亮 徐全倩 |
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| 作者单位： | 江西省气象信息中心,江西 南昌 330096 |
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| 基金项目： | 2020年江西省气象局重点项目“江西省气象大数据云平台支撑技术研究”. |
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| 摘 要： | 利用2017—2020年江西省36站壤土质地土壤水分观测站土壤体积含水量资料和降水资料,研究了江西省土壤体积含水量对降水过程的响应特征.结果表明:1)土壤体积含水量对不同类型降水过程的响应差异大,对于小于10 mm的降水过程几乎无响应,对10—25 mm的降水过程响应深度为0—10 cm,对25—50 mm的降水过程响应深度为0—20 cm,对大于50 mm的降水过程响应深度为0—60 cm.2)土壤体积含水量对降水的响应分为快速增长和平稳减弱两个阶段,在快速增长阶段土壤体积含水量先快速增长到最大值,然后缓慢下降,且增长阶段的持续时间小于减弱阶段的持续时间,增长过程和减弱过程不对称.3)响应过程的持续时间主要集中在1—9 h,其中3—6 h占比高达49％.
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| 关 键 词： | 土壤体积含水量 降水过程 响应特征 |
| 收稿时间： | 2021/4/2 0:00:00 |
| 修稿时间： | 2021/6/8 0:00:00 |
Study on the response of soil volumetric water content to precipitation in Jiangxi province |
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| Yuan Zhengguo,Lai Liang and Xu Quanqian.Study on the response of soil volumetric water content to precipitation in Jiangxi province[J].Meteorology and Disaster Reduction Research,2021,44(2):141-146. |
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| Authors: | Yuan Zhengguo Lai Liang and Xu Quanqian |
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| Institution: | Jiangxi Meteorological Information Cente,Jiangxi Meteorological Information Cente and Jiangxi Meteorological Information Cente |
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| Abstract: | Based on hourly soil volumetric water content data of 36 stations and precipitation data observed at their adjacent surface stations in Jiangxi province from 2017 to 2020, the response of soil water content to different rain processes were studied. 1) The soil volumetric water content presented no response when the precipitation was smaller than 10 mm, the response depth was 0-10 cm and 0-20 cm as the precipitation was 10-25 mm and 25-50 mm, respectively, and the response depth was 0-60 cm for the precipitation of more than 50mm. 2) The response of soil volumetric water content to precipitation could be divided into the rapid growth stage and the steady decline stage. In the rapid response stage, the soil volumetric water content increased rapidly to some extent, and then decreased. The duration of the growth process was usually shorter than that of the decline process, and there were not symmetrical. 3) The duration of response process was mainly concentrated in 1-9 hours, and the 3-6 hours accounted for 49%. |
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| Keywords: | soil volumetric content precipitation process response characteristic |
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