Rainfall erosivity shows the potential ability of the soil loss caused by rainfall and it is very important for predicting soil loss quantitatively. A rainfall erosivity model using daily rainfall amounts to estimate half-month rainfall erosivity directly was established from data of 71 weather stations in China. The average coefficient of determination for all stations was 0.718 and the average relative error estimating the annual average rainfall erosivity was 4.2%. Both parameters of α and β in the model were different in different regions. The parameter α was high correlative with parameter β and parameter β was related to rainfall characteristics, so both parameters could be estimated by using rainfall indexes. With the set of parameter values estimated by using rainfall indexs,the average coefficient of determination decreased to 0.697 and the average relative error estimating the annual average rainfall erosivity increased to 17.3%. The model worked very well in the regions where the rainfall was abundant and the result was on the low side when extreme storm erosivty was estimated. The daily rainfall erosivity model could be used to estimate the annual average rainfall erosivity and its seasonal distribution.
ZHANG Wen-Bo, XIE Yun, LIU Bao-Yuan
. Rainfall Erosivity Estimation Using Daily Rainfall Amounts[J]. SCIENTIA GEOGRAPHICA SINICA, 2002
, 22(6)
: 705
-711
.
DOI: 10.13249/j.cnki.sgs.2002.06.705
[1] Wischmeier W H, Smith D D. Predicting rainfall erosion losses: A guide to conservation planning[M]. Agriculture Handbook, 1978. No. 537. USDA,
[2] Renard K G, Foster G R, Weesies G A,et al. Predicting soil Erosion By Walter: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE)[M]. National Technical Information Service, USDA,1997.
[3] Knisel W G. CREAMS: Afield Scale Model for Chemicals, runoff, and Erosions from Agricultural Management Systems[M]. Conservation Research Report No.26, USDA.
[4] Young R A, et al. AGNPS: A nonpoint source pollution model for evaluating agricultural watersheds[J]. Soil and Water Conservation Society, 1989,44(2): 168-173.
[5] Wischmeie W H. A rainfall rrosion index for a universal soil loss equation[J]. Soil Science Society Proceedings, 1959,23(3): 246-249.
[6] 王万中,焦菊英,郝小品,等. 中国降雨侵蚀力R值的计算与分布(I)[J]. 水土保持学报,1995,9(4):5~18.
[7] Ferro V, Porto P, Yu B. A comparative study of rainfall erosivity estimation for southern Italy and southeastern Australia[J]. Hydrological Sciences Journal, 1999, 44(1):3-24.
[8] Renard K G, Freimund J R. Using Monthly Precipitation Data to Estimate the R-factor in the Revised USLE[J]. Journal of Hydrology, 1994, 157:287-306.
[9] Yu B,Rosewell C J. A robust estimat of the R-factor for the universal soil loss equation[J]. Transactions of the ASAE, 1996,39(2):559-561.
[10] 张宪奎,许谨华,卢秀琴,等. 黑龙江省土壤流失方程的研究[J]. 水土保持通报, 1992, 12(4):1~9.
[11] 吴素业. 安徽大别山降雨侵蚀力简易算法与时空分布规律研究[J]. 中国水土保持, 1994, (4):12~13.
[12] 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):13~18.
[13] Richardson C W, Foster G R, Wright D A. Estimation of erosion index from daily rainfall amount[J]. Transactions of the ASAE, 1983,26(1): 153-156.
[14] Haith D A, Merrill D E. Evaluation of a daily erosivity model[J]. Transactions of the ASAE, 1987, 30(1):90-93.
[15] Sheridan J M, Davis F M, Mester M L,et al. Seasonal distribution of rainfall erosiovity in peninsular Florida[J]. Transactions of the ASAE,1989,32(5):1555-1560.
[16] Selker J S, Haith D A, Reynolds J E. Calibration and testing of a daily rainfall erosivity model[J]. Transactions of the ASAE, 1990,33(5):1612-1688.
[17] Bagarello V, D'Asaro F. Estimation single storm erosion index[J]. Transactions of the ASAE,1994, 37(3):785-791.
[18] Elsenbeer H, Cassel D K, Tinner W. A daily rainfall erosivity model for western Amazonia[J]. Journal of Soil and Water Conservation, 1993, 48(5):439-444.
[19] Yu B. Rainfall erosivity and its estimation for Australia's tropics[J]. Australian Journal of Soil Research,1998,36(1):143-165.
[20] 中国气象局(编制). 中国气候资源地图集[M]. 北京: 地图出版社,1994.
[21] 谢 云,刘宝元,章文波. 侵蚀性降雨标准研究[J]. 土壤侵蚀与水土保持学报,2000, 14(4):6~11.
[22] Myers R H. Classical and modern regression with application[M]. Boston,MS: PWS Publishers,1986.
[23] 谢 云,章文波,刘宝云.用日雨量和日雨强计算降雨侵蚀力[J].水土保持通报,2001,21(6): 53~56.
[24] 袁建平,等.黄土丘陵沟壑区小流域降雨入渗产流点面转化[J].地理科学,2001,21(3): 262~266.
[25] 张 燕,等.人类干扰对土壤侵蚀及土壤质量的影响[J].地理科学,2002, 22(3): 335~340.
[26] 盛 骤,谢式千,潘承毅. 概率论与数理统计[M]. 北京:高等教育出版社,1994. 200~202.
[27] 王万中,焦菊英. 中国的土壤侵蚀因子定量评价研究[J]. 水土保持通报, 1996,16(5):1~20.
