PDF Download

[1]LIAO Xin,XU Xue-xuan,LIU Pu-ling.The Dynamic Feature Analysis of Rainfall Erosivity in Yan’an Area Based on Daily Rainfall Amounts[J].Research of Soil and Water Conservation,2009,16(02):34-37,41.

Copy

The Dynamic Feature Analysis of Rainfall Erosivity in Yan’an Area Based on Daily Rainfall Amounts

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 02 Page number: 34-37,41 Column: Public date: 2009-04-20

Title:: The Dynamic Feature Analysis of Rainfall Erosivity in Yan’an Area Based on Daily Rainfall Amounts

Author(s):: LIAO Xin¹, XU Xue-xuan², LIU Pu-ling²; 1. Northwest A & F University, Yangling, Shanxi, 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shanxi, 712100, China

Keywords:: rainfall erosivity; daily rainfall amount; Yan’an

CLC:: S157.1

DOI:: -

Abstract:: Yan’an is one of the areas in which the soil erosion is most serious on the loess plateau.Rainfall erosivity in Yan’an area was estimated by the method of a simple model based on daily rainfall amounts using daily rainfall amounts data from 1951 to 2005 of Yan’an weather stations.The results showed that the monthly rainfall erosivity mainly concentrated from June to September; the rainfall erosivity of this period is 85.6% of annual rainfall erosivity.The annual average value of rainfall erosivity was 1 765.73 MJ·mm/(hm²·h),which was a moderate change in the values of erosivity per year.The paper used two indicators to describe the change of annual rainfall erosivity:the coefficient of variation Cv and the coefficient of changed trend r.By calculation,the coefficient of variation Cv was 0.41,the coefficient of changed trend r was -0.071.So the whole trend of the yearly erosivity value among 55 years was balanced.

References:: [1] 章文波,谢云,刘宝元.用雨量和雨强计算次降雨侵蚀力[J].地理研究,2002,21(3):384-390.
[2] 唐克丽.中国水土保持[M].北京:科学出版社,2004:310-337.
[3] 卜兆宏,董勤瑞,周伏建,等.降雨侵蚀力因子新算法的初步研究[J].土壤学报,1992,29(4):408-417.
[4] 王万忠,焦菊英,郝小品,等.中国降雨侵蚀力R值的计算和分布(Ⅱ)[J].土壤侵蚀与水土保持学报,1996,2(1):29-39.
[5] 吴素业.安徽大别山区降雨侵蚀力简化算法与时空规律[J].中国水土保持,1994(4):12-13.
[6] 周伏建,陈明华,林福兴,等.福建省降雨侵蚀力指标R值[J].水土保持学报,1995,9(1):12-18.
[7] 章文波,谢云,刘宝元.利用日雨量计算降雨侵蚀力的方法研究[J].地理科学,2002,22(6):705-711.
[8] 谢云,刘宝元,章文波.侵蚀性降雨标准的研究[J].水土保持学报,2000,14(4):6-11.
[9] 缪驰远,徐霞,魏欣,等.重庆市主城区降雨侵蚀力特征分析[J].资源科学,2007,29(4):54-60.
[10] 谢云,章文波,刘宝元.用日雨量和雨强计算降雨侵蚀力[J].水土保持通报,2001,21(6):53-56.

Similar References:

Memo

Last Update: 1900-01-01