[1]SU Yuanyi,LI Peng,REN Zongping,et al.Effect of Slope Gradient on the Process of Runoff and Sediment Yield and Water-Sediment Relation on the Loess Slope[J].Research of Soil and Water Conservation,2020,27(02):118-122.
Copy
Effect of Slope Gradient on the Process of Runoff and Sediment Yield and Water-Sediment Relation on the Loess Slope
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
118-122
Column:
Public date:
2020-03-30
- Title:
- Effect of Slope Gradient on the Process of Runoff and Sediment Yield and Water-Sediment Relation on the Loess Slope
- CLC:
- S157; P333
- DOI:
- -
- Abstract:
- In order to explore the effect of slope gradient on erosion and water-sediment relationship on the loess slope under a rainfall event, simulated rainfall experiments were carried out in the laboratory, and the water-sediment relationship on the loess slope was studied with energy theory. The results show that:(1)under the condition of a rainfall event, the trend of sediment yield intensity on slope over runoff yield time is more complex than that of runoff yield intensity, and there is the asynchrony between the two trends over the runoff yield time;(2)the relationship between total runoff and sediment yield can be described by quadratic, and there is a critical value of quantitative change between the gradients ranging from 20° to 25°;(3)there is a positive correlation between runoff intensity and sediment yield intensity, and the coefficient of equation decreases with the increase of slope gradient;(4)there is a positive correlation between cumulative runoff and sediment yield, and the absolute value of correlation coefficient is proportional to slope gradient;(5)the average runoff energy increases or decreases with the change of slope gradient; in the process of slope erosion, the relationship between average runoff energy and average sediment yield intensity is positively correlated, and can be described by linear equation; the average runoff energy can reasonably predict the sediment transport capacity of Loess slope. These results can provide the theoretical basis for understanding the mechanism of soil erosion in Loess area.
- References:
-
[1] 王占礼.中国土壤侵蚀影响因素及其危害分析[J].山西水土保持科技,2000(2):15-17.
[2] 张晴雯,雷廷武,潘英华,等.细沟侵蚀可蚀性参数及土壤临界抗剪应力的有理(试验)试验求解方法[J].中国科学院大学学报,2004,21(4):468-475.
[3] Zingg A W. Degree and length of land slope as it affects soil loss in runoff[J]. Agricultural Engineering, 1940,21(2):59-64.
[4] 耿晓东.主要水蚀区坡面土壤侵蚀过程与机理对比研究[D].北京:中国科学院研究生院,2010.
[5] Horton R E. Erosinal development of streams and their drainage basins: Hidrophysical approach to quantitative morghology[J]. Journal of the Japanese Forestry Society, 1945, 56(3):275-370.
[6] 陈晓安,蔡强国,张利超,等.黄土丘陵沟壑区坡面土壤侵蚀的临界坡度[J].山地学报,2010,28(4):415-421.
[7] 张会茹,郑粉莉,耿晓东.地面坡度对红壤坡面土壤侵蚀过程的影响研究[J].水土保持研究,2009,16(4):52-54.
[8] 倪九派,魏朝富,谢德体,等.坡度对三峡库区紫色土坡面径流侵蚀的影响分析[J].泥沙研究,2009(2):29-33.
[9] 刘青泉,陈力,李家春.坡度对坡面土壤侵蚀的影响分析[J].应用数学和力学,2001,22(5):449-457.
[10] 靳长兴.论坡面侵蚀的临界坡度[J].地理学报,1995,50(3):234-239.
[11] 李光录,吴发启,庞小明,等.泥沙输移与坡面降雨和径流能量的关系[J].水科学进展,2008,19(6):868-874.
[12] 李占斌,鲁克新.黄土坡面土壤侵蚀动力过程试验研究[J].水土保持学报,2002,16(2):5-7.
[13] 丁文峰.黄土区坡面径流侵蚀动力过程试验研究[D].陕西杨凌:西北农林科技大学,2001.
[14] 李勉,姚文艺,陈江南,等.草被覆盖下坡沟系统坡面流能量变化特征试验研究[J].水土保持学报,2005,19(5):13-17.
[15] 耿晓东,郑粉莉,张会茹.红壤坡面降雨入渗及产流产沙特征试验研究[J].水土保持学报,2009,23(4):39-43.
[16] 盛贺伟,郑粉莉,蔡强国,等.降雨强度和坡度对粘黄土坡面片蚀的影响[J].水土保持学报,2016,30(6):13-17.
[17] 王刘华,姚超伟,宋飞.黄土边坡坡面冲刷的临界坡度[J].灾害学,2012,27(4):25-27.
[18] 田风霞,王占礼,牛振华,等.黄土坡面土壤侵蚀过程试验研究[J].干旱地区农业研究,2005,23(6):141-146.
[19] 谭宽祥.黄土高原黄土土流与坡度关系的研究[J].水土保持通报,1990,10(4):13-15.
[20] 范荣生,李占斌.用于降雨侵蚀的人工模拟降雨装置试验研究[J].水土保持学报,1991,5(2):38-45.
[21] 魏霞,李勋贵,李占斌.黄土凸型复合坡面径流能量变化特征试验研究[J].水土保持学报,2014,28(6):71-76.
[22] Xu G, Tang S, Lu K, et al. Runoff and sediment yield under simulated rainfall on sand-covered slopes in a region subject to wind-water erosion[J]. Environmental Earth Sciences, 2015,74(3):2523-2530.
[23] 张辉,李鹏,汤珊珊,等.多场次降雨条件下覆沙坡面的径流产沙特性试验研究[J].泥沙研究,2016(6):59-65.
[24] 陈正发,夏清,史东梅,等.基于模拟降雨的土壤表土结皮特征及坡面侵蚀响应[J].水土保持学报,2011,25(4):6-11.
[25] 程琴娟,蔡强国,李家永.表土结皮发育过程及其侵蚀响应研究进展[J].地理科学进展,2005,24(4):114-122.
[26] 吴发启,范文波.土壤结皮对降雨入渗和产流产沙的影响[J].中国水土保持科学,2005,3(2):97-101.
[27] Gómez J A, Nearing M A. Runoff and sediment losses from rough and smooth soil surfaces in a laboratory experiment[J]. Catena, 2005,59(3):253-266.
[28] 王茹.不同坡度条件下紫色土坡面土壤侵蚀特征研究[D].重庆:西南大学,2013.
[29] 王瑄,李占斌,尚佰晓,等.坡面土壤剥蚀率与水蚀因子关系室内模拟试验[J].农业工程学报,2008,24(9):22-26.
- Similar References:
Memo
-
Last Update:
2020-02-25