The Characteristics of Extreme Erosion Events in a Small Mountainous Watershed

被引：16
作者：
Fang, Nu-Fang [1 ,2 ,3 ]
Shi, Zhi-Hua [1 ,2 ,3 ,4 ]
Yue, Ben-Jiang [2 ,3 ]
Wang, Ling [2 ,3 ]
机构：
[1] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China
[2] Chinese Acad Sci, Inst Soil & Water Conservat, Yangling, Peoples R China
[3] Minist Water Resources, Yangling, Peoples R China
[4] Huazhong Agr Univ, Coll Resources & Environm, Wuhan, Peoples R China
来源：
PLOS ONE | 2013年 / 8卷 / 10期
基金：
中国国家自然科学基金;
关键词：
SUSPENDED SEDIMENT TRANSPORT; LAND-USE CHANGE; ABANDONED FARMLAND CATCHMENT; CENTRAL SPANISH PYRENEES; SOIL-EROSION; AGRICULTURAL CATCHMENT; EPHEMERAL CHANNELS; RAINFALL EVENTS; SE SPAIN; RUNOFF;
D O I：
10.1371/journal.pone.0076610
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A large amount of soil loss is caused by a small number of extreme events that are mainly responsible for the time compression of geomorphic processes. The aim of this study was to analyze suspended sediment transport during extreme erosion events in a mountainous watershed. Field measurements were conducted in Wangjiaqiao, a small agricultural watershed (16.7 km(2)) in the Three Gorges Area (TGA) of China. Continuous records were used to analyze suspended sediment transport regimes and assess the sediment loads of 205 rainfall-runoff events during a period of 16 hydrological years (1989-2004). Extreme events were defined as the largest events, ranked in order of their absolute magnitude (representing the 95th percentile). Ten extreme erosion events from 205 erosion events, representing 83.8% of the total suspended sediment load, were selected for study. The results of canonical discriminant analysis indicated that extreme erosion events are characterized by high maximum flood-suspended sediment concentrations, high runoff coefficients, and high flood peak discharge, which could possibly be explained by the transport of deposited sediment within the stream bed during previous events or bank collapses.
引用
收藏
页数：10
相关论文
共 51 条
[1]   The response of soil erosion and sediment export to land-use change in four areas of Europe: The importance of landscape pattern [J].
Bakker, Martha M. ;
Govers, Gerard ;
van Doom, Anne ;
Quetier, Fabien ;
Chouvardas, Dimitris ;
Rounsevell, Mark .
GEOMORPHOLOGY, 2008, 98 (3-4) :213-226
[2]   Forests and floods in Latin America: science, management, policy and the EPIC FORCE project [J].
Bathurst, James C. ;
Amezaga, Jaime ;
Cisneros, Felipe ;
Gavino Novillo, Marcelo ;
Iroume, Andres ;
Lenzi, Mario A. ;
Mintegui Aguirre, Juan ;
Miranda, Miriam ;
Urciuolo, Adriana .
WATER INTERNATIONAL, 2010, 35 (02) :114-131
[3]  
Belmonte AMC, 2001, CATENA, V45, P229, DOI 10.1016/S0341-8162(01)00146-1
[4]   The impact of rainstorms on floods in ephemeral channels in southeast Spain [J].
Bull, LJ ;
Kirkby, MJ ;
Shannon, J ;
Hooke, JM .
CATENA, 2000, 38 (03) :191-209
[5]   A regional analysis of the effects of largest events on soil erosion [J].
Carlos Gonzalez-Hidalgo, J. ;
Batalla, Ramon J. ;
Cerda, Artemio ;
de Luis, Martin .
CATENA, 2012, 95 :85-90
[6]   Land-use change in a small catchment of northern Loess Plateau, China [J].
Chen, LD ;
Wang, J ;
Fu, BJ ;
Qiu, Y .
AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 2001, 86 (02) :163-172
[7]   Yangtze River sediment: In response to Three Gorges Reservoir (TGR) water impoundment in June 2003 [J].
Chu, Zhong-Xin ;
Zhai, Shi-Kui .
JOURNAL OF COASTAL RESEARCH, 2008, 24 (1A) :30-39
[8]   Extreme events controlling erosion and sediment transport in a semi-arid sub-andean valley [J].
Coppus, R ;
Imeson, AC .
EARTH SURFACE PROCESSES AND LANDFORMS, 2002, 27 (13) :1365-1375
[9]   Unusual Salinity Conditions in the Yangtze Estuary in 2006: Impacts of an Extreme Drought or of the Three Gorges Dam? [J].
Dai, Zhijun ;
Chu, Ao ;
Stive, Marcel ;
Zhang, Xiaoling ;
Yan, Hong .
AMBIO, 2011, 40 (05) :496-505
[10]   Hydrological response of a small mediterranean agricultural catchment [J].
Estrany, Joan ;
Garcia, Celso ;
Batalla, Ramon J. .
JOURNAL OF HYDROLOGY, 2010, 380 (1-2) :180-190
123456