黄土区坡面侵蚀性径流标准与水沙关系分析

doi:10.16843/j.sswc.2022.06.002

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Abstract [Background] When identifying erosive events, scholars primarily focused on erosive rainfall, but ignored the importance of runoff erosivity, which is one of the key factors influencing sediment flow behavior. Effectively identifying the relationship between runoff and sediment in erosive runoff is beneficial to a thorough understanding of the law of flow and sediment movement on slopes. Therefore, the standard for erosive runoff should be proposed to further reveal the mechanism of erosion from slope runoff. [Methods] The hydrological data used in the study was downloaded from National Earth System Science Data Center, National Science & Technology Infrastructure of China (http://www.geodata.cn). Erosive runoff standard was determined by the frequency analysis method. The procedures are: 1) M_s (area-specific sediment yield) was arranged in descending order of peak discharge or runoff depth; 2) summing the cumulative M_s in descending order, calculating the cumulative percentage of M_s to overall M_s of all runoff events; 3) optimal regression equations between cumulative percentage of M_s and peak discharge or runoff depth were acquired by regression analysis; 4) given that the cumulative percentage of M_s was 95%, the corresponding peak discharge and runoff depth were calculated through the optimal regression equations, then the erosive runoff standard was determined. Runoff-sediment relationship of erosive and non-erosive runoff events were analyzed at inter- and intra-events time scales through regression analysis method. [Results] 1) In this study, the general reference standards for erosive runoff are: ① The runoff duration is at least 8min; ② the peak discharge is above 2.3dm³/s; ③ the runoff depth is greater than 2.3mm; ④ the area-specific sediment yield is more than 0.3kg/m² (equivalent to 300t/km²). 2) The area-specific sediment yield by erosive runoff is mainly controlled by runoff depth whereas the mean sediment concentration is primarily driven by the peak discharge. On the basis of the erosive runoff standard, the sediment reduction benefit caused by regulating runoff depth is 8% higher than controlling peak discharge. 3) There is a power function relationship between instantaneous sediment concentration and instantaneous discharge in erosive events, and a stable tendency (approximately 490kg/m³) emerges in instantaneous sediment concentration when instantaneous discharge exceeds a critical value (8-14dm³/s). 4) There is a positive linear correlation between instantaneous sediment transport rate and instantaneous discharge in erosive events, and the positive linear correlation also appears between increment in area-specific sediment yield and increment in runoff depth. The sediment delivery capacity and sediment yield capacity of erosive runoff are 2.9 times and 2.7 times that of non-erosive runoff, respectively. [Conculsions] Compared with non-erosive runoff, the capacity of sediment transport and sediment yielding from erosive runoff is larger and the runoff-sediment relationship is more stable. Therefore, the proposal of erosive runoff standard is feasible in the present study, and then runoff regulation in slope should be orientated at the conversion from erosive runoff to non-erosive runoff.

Key words： erosive runoff soil erosion runoff-sediment relationship inter-event time scale intra-event time scale

Received: 18 October 2021

PACS:

S157.1

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	Articles by authors
	WANG Qingyuan
	ZHANG Letao
	HE Mengzhen
	WEI Yiyuan

Cite this article:

WANG Qingyuan,ZHANG Letao,HE Mengzhen, et al. Erosive runoff standard and runoff-sediment relationship analysis on loess slope[J]. SSWC, 2022, 20(6): 8-16.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2022.06.002 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2022/V20/I6/8

[1]	张乐涛, 李占斌, 王杉杉. 坡面径流类型对侵蚀产沙及水沙传递关系的影响[J]. 农业工程学报, 2015, 31(20): 124. ZHANG Letao, LI Zhanbin, WANG Shanshan. Impact of runoff regimes on sediment yield and sediment flow behavior at slope scale[J]. Transactions of the CSAE, 2015, 31(20): 124.
[2]	SHEN Haiou, ZHENG Fenli, WEN Leilei, et al. Impacts of rainfall intensity and slope gradient on rill erosion processes at loessial hillslope[J]. Soil and Tillage Research, 2016, 155: 429.
[3]	晏清洪, 原翠萍, 雷廷武, 等. 降雨类型和水土保持对黄土区小流域水土流失的影响[J]. 农业机械学报, 2014, 45(2): 169. YAN Qinghong, YUAN Cuiping, LEI Tingwu, et al. Effect of rainstorm patterns and soil control practices on soil and water loss in small watershed on Loess Plateau[J]. Transactions of the CSAM, 2014, 45(2): 169.
[4]	朱冰冰, 霍云霈, 周正朝. 黄土高原坡沟系统植被格局对土壤侵蚀影响研究进展[J]. 中国水土保持科学, 2021, 19(4): 149. ZHU Bingbing, HUO Yunpei, ZHOU Zhengchao. Research progress in impact of vegetation pattern on soil erosion in the slope-gully system of the Loess Plateau[J]. Science of Soil and Water Conservation, 2021, 19(4): 149.
[5]	WISCHMEIER W H, SMITH D D. Predicting rainfall erosion losses: A guide for conservation planning [M]. Washington DC: USDA Agricultural Handbook, 1978: 5.
[6]	王万忠. 黄土地区降雨特性与土壤流失关系的研究Ⅲ:关于侵蚀性降雨的标准问题[J]. 水土保持通报, 1984, 4(2): 58. WANG Wanzhong. Study on the relations between rainfall characteristics and loss of soil in loess region[J]. Bulletin of Soil and Water Conservation, 1984, 4(2): 58.
[7]	谢云, 刘宝元, 章文波. 侵蚀性降雨标准研究[J]. 水土保持学报, 2000, 14(4): 6. XIE Yun, LIU Baoyuan, ZHANG Wenbo. Study on standard of erosive rainfall[J]. Journal of Soil and Water Conservation, 2000, 14(4): 6.
[8]	张兴刚, 王春红, 程甜甜, 等. 山东省药乡小流域侵蚀性降雨分布特征[J]. 中国水土保持科学, 2017, 15(1): 128. ZHANG Xinggang, WANG Chunhong, CHENG Tiantian, et al. Distribution characteristics of erosive rainfall in Yaoxiang Small Watershed of Shandong province[J]. Science of Soil and Water Conservation, 2017, 15(1): 128.
[9]	TODISCO F, VERGNI L, VINCI A, et al. Practical thresholds to distinguish erosive and rill rainfall events[J]. Journal of Hydrology, 2019, 579: 124.
[10]	孙正宝, 陈治谏, 廖晓勇, 等. 侵蚀性降雨识别的模糊隶属度模型建立及应用[J]. 水科学进展, 2011, 22(6): 801. SUN Zhengbao, CHEN Zhijian, LIAO Xiaoyong, et al. Development and application of a fuzzy membership model for identifying erosive rainfall events[J]. Advance in Water Science, 2011, 22(6): 801.
[11]	何绍浪, 李凤英, 何小武. 水蚀预报中降雨侵蚀力研究进展[J]. 水土保持通报, 2018, 38(2): 262. HE Shaolang, LI Fengying, HE Xiaowu. Research process of rainfall erosivity for water erosion prediction[J]. Bulletin of Soil and Water Conservation, 2018, 38(2): 262.
[12]	ZHANG Letao, LI Zhanbin, WANG He, et al. Influence of intra-event-based flood regime on sediment flow behavior from a typical agro-catchment of the Chinese Loess Plateau[J]. Journal of Hydrology, 2016, 538: 71.
[13]	王万忠, 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. WANG Wanzhong, JIAO Juying. Quantitative evaluation on factor influencing soil erosion in China[J]. Bulletin of Soil and Water Conservation, 1996, 16(5): 1.
[14]	ZHENG Mingguo, LI Runkui, HE Jijun. Sediment concentrations in run-off varying with spatial scale in an agricultural subwatershed of the Chinese Loess Plateau[J]. Hydrological Processes, 2015, 29(26): 5414.
[15]	颜明, 贺莉, 郑明国, 等. 泾河流域高含沙水流的尺度效应研究[J]. 水土保持学报, 2017, 31(4): 75. YAN Ming, HE Li, ZHENG Mingguo, et al. Scale effect of hyper-concentrated flows in Jinghe river basin, Yellow River[J]. Journal of Soil and Water Conservation, 2017, 31(4): 75.
[16]	李占斌, 鲁克新, 李鹏, 等. 基于径流侵蚀功率的流域次暴雨产沙模型研究[C]. 第六届全国泥沙基本理论研究学术讨论会. 郑州: 中国水利学会, 2005: 54. LI Zhanbin, LU Kexin, LI Peng, et al. Prediction of watershed sediment transport for single rainstorm based on runoff erosion power [C]. The Sixth National Basic Theory of Sedimentation Research Symposium. Zhengzhou: The Yellow River Water Conservancy Press, 2005: 54.
[17]	郑明国, 蔡强国, 程琴娟. 一种新的流域水沙关系模型及其在年际时间尺度的应用[J]. 地理研究, 2007, 26(4): 745. ZHENG Mingguo, CAI Qiangguo, CHENG Qinjuan. One new sediment yield model for single storm events and its application at annual time scale[J]. Geographical Research, 2007, 26(4): 745.
[18]	郑海金, 胡建民, 黄鹏飞, 等.红壤坡耕地地表径流与壤中流氮磷流失比较[J]. 水土保持学报, 2014, 28(6): 41. ZHENG Haijin, HU Jianmin, HUANG Pengfei, et al. Analysis of the erosive rainfall and rainfall erosion energy on red soil slopeland[J]. Journal of Soil and Water Conservation, 2014, 28(6): 41.
[19]	王玲莉, 张富, 胡彦婷, 等. 侵蚀性降雨分类及植被类型对产流产沙的影响[J]. 人民黄河, 2021, 43(10): 109. WANG Lingli, ZHANG Fu, HU Yanting, et al. Effects of erosive rainfall classification and vegetation types on runoff and sediment load generation[J]. Yellow River, 2021, 43(10): 109.
[20]	高磊, 饶良懿, 崔飞波, 等. 太行山土石山区侵蚀性降雨对典型植物措施产流产沙的影响[J]. 水土保持学报, 2017, 31 (1): 5. GAO Lei, RAO Liangyi, CUI Feibo, et al. Effect of erosive rainfall on runoff and sediment yield of typical plant measures in rocky mountain areas of Taihang[J]. Journal of Soil and Water Conservation, 2017, 31(1): 5.
[21]	张文源, 王百田, 杨光檄, 等. 喀斯特黄壤区侵蚀性降雨及产沙特征分析[J]. 生态环境学报, 2014, 23(11): 1776. ZHANG Wenyuan, WANG Baitian, YANG Guangxi, et al. Erosive rainfall and characteristics analysis of sediment yield on yellow soil area in karst mountainous [J]. Ecology and Environmental Sciences, 2014, 23(11): 1776.
[22]	邬铃莉, 王云琦, 王晨沣, 等. 降雨类型对北方土石山区坡面土壤侵蚀的影响[J]. 农业工程学报, 2017, 33(24): 157. WU Lingli, WANG Yunqi, WANG Chenfeng, et al. Effect of rainfall patterns on hillslope soil erosion in rocky mountain area of North China[J]. Transactions of the CSAE, 2017, 33(24): 157.
[23]	周晗, 严俊霞, 李洪建, 等. 晋西黄土区坡耕地不同下垫面水土流失对侵蚀性降雨的响应[J]. 水土保持研究, 2019, 26(4): 7. ZHOU Han, YAN Junxia, LI Hongjian, et al. Response of soil and water loss on different underlying surfaces of sloping farmland to erosive rainfall in the loess area of western Shanxi province[J]. Research of Soil and Water Conservation, 2019, 26(4): 7.
[24]	崔璨, 王小燕, 孙宁婷, 等. 三峡库区典型农业小流域次降雨产沙过程及其影响因素[J]. 水土保持学报, 2021, 35(1): 17. CUI Can, WANG Xiaoyan, SUN Ningting, et al. Sediment yield process and its influencing factors under sub-rainfall in typical agricultural small watershed, Three Gorges Reservoir area[J]. Journal of Soil and Water Conservation, 2021, 35(1): 17.
[25]	谢波, 杨广斌, 李亦秋, 等. 黔中喀斯特山地侵蚀性降雨特征及其侵蚀响应[J]. 生态科学, 2021, 40(3): 222. XIE Bo, YANG Guangbin, LI Yiqiu, et al. Analysis of erosion rainfall characteristics and erosion response in karst mountain of central Guizhou[J]. Ecological Science, 2021, 40(3): 222.
[26]	ZHENG Mingguo, CHEN Weiming. Determination of erosive events in the Chinese Loess Plateau using the runoff threshold[J]. Journal of Soils and Sediments, 2017, 17(4): 1182.