基于热带地区逐时雨量资料的年降雨侵蚀力指数估算

IF 1.7 4区农林科学 Q4 SOIL SCIENCE

Soil and Water Research Pub Date : 2020-11-16 DOI:10.17221/25/2020-swr

Ming-Hsi Lee, I-Ping Hsu

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引用次数: 1

摘要

年平均降雨侵蚀力(R)反映了降雨和径流造成的潜在土壤流失，用于预测农业坡地的土壤流失。R由连续记录雨量资料库的雨量站计算。然而，许多与降雨强度相关的短期实时降雨数据库在台湾地区并不容易获得，以小时降雨量数据为主。由10 min降水资料积累转化成30 min降水资料(R10_30)计算得到的年平均降雨侵蚀力，可以用10 min降水资料积累转化成逐时降水资料(R10_60)计算得到的年平均降雨侵蚀力进行估算，而逐时降水资料(E60j)则由10 min降水资料积累转化成逐时降水资料(E60j)计算得到。在台湾南部各雨量站，已建立由10分钟雨量资料累积转换成每小时雨量资料(I60j)计算的最大60分钟雨量。10 min降水数据集由2002 - 2017年台湾热带地区51个雨量站监测的15 221次暴雨事件组成。根据研究结果，利用10 min降水资料可估算出其动能的平均转换系数为1.04，降雨侵蚀力为1.47，年平均降雨侵蚀力为1.30。

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Estimation of the annual rainfall erosivity index based on hourly rainfall data in a tropical region

The annual mean rainfall erosivity (R) indicates the potential soil loss caused by the precipitation and runoff and is used to predict the soil loss from agricultural hillslopes. R is calculated from rainfall stations with continuously recording rainfall databases. However, many short-term real-time rainfall databases that also relate to the rainfall intensity are not readily available around Taiwan, with the hourly rainfall data being predominantly available. The annual mean rainfall erosivity calculated by the 10-min rainfall data accumulation converted to the 30-min rainfall data (R10_30) can be estimated using the annual mean rainfall erosivity calculated by the 10-min rainfall data accumulation convert to the hourly rainfall data (R10_60) that are calculated from the kinetic energy calculated by the 10-min rainfall data accumulation converted to the hourly rainfall data (E60j). The maximum 60-min rainfall intensity calculated by the 10-min rainfall data accumulation converted to the hourly rainfall data (I60j) has been established in rainfall stations throughout southern Taiwan. The 10-min rainfall data set consists of 15 221 storm events from 2002 to 2017 monitored by 51 rainfall stations located in the tropical regions in Taiwan. According to the results of this study, the average conversion factors of the kinetic energy (1.04), rainfall erosivity (1.47), and annual mean rainfall erosivity (1.30) could be estimated based on the 10-min rainfall data.

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来源期刊

Soil and Water Research Water resources, Soil Science, Agriculture-WATER RESOURCES

CiteScore

4.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An international peer-reviewed journal published under the auspices of the Czech Academy of Agricultural Sciences and financed by the Ministry of Agriculture of the Czech Republic. Published since 2006. Thematic: original papers, short communications and critical reviews from all fields of science and engineering related to soil and water and their interactions in natural and man-modified landscapes, with a particular focus on agricultural land use. The fields encompassed include, but are not limited to, the basic and applied soil science, soil hydrology, irrigation and drainage of lands, hydrology, management and revitalisation of small water streams and small water reservoirs, including fishponds, soil erosion research and control, drought and flood control, wetland restoration and protection, surface and ground water protection in therms of their quantity and quality.