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J4  2013, Vol. 47 Issue (5): 803-811    DOI: 10.3785/j.issn.1008-973X.2013.05.010
土木工程     
降雨移动方向对坡面侵蚀泥沙浓度的影响
冉启华,史致男,许月萍
浙江大学 水利工程学系,浙江 杭州 310058
Impacts of moving rainfall on sediment concentration of soil erosion
RAN Qi-hua, SHI Zhi-nan, XU Yue-ping
Department of Hydraulic Engineering, Zhejiang University, Hangzhou 310058, China
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摘要:

为了探讨降雨移动方向对坡面下游出口处侵蚀泥沙浓度特性的影响,及其产沙产流量相对比值关系,本文主要通过室内小尺度坡面人工降雨物理模型试验展开研究.结果表明:降雨向上移动时,连续降雨过程各侵蚀泥沙浓度过程曲线形态相似,而降雨向下移动时,首场与后几场工况的泥沙浓度曲线差异鲜明;针对首场后的降雨工况,降雨向上移动泥沙浓度过程曲线均出现1个峰值,峰值泥沙浓度为6~90 g/L,而降雨向下移动时均出现2个峰值,相应值为11~68 g/L,且后者在弱雨强工况下标准差最小;2类移动工况的等效侵蚀泥沙浓度在不同雨强下随产沙峰值增加的增幅均表现为:弱雨强>中雨强>强雨强.总体上,相同条件(降雨强度、降雨历时、坡面土壤特性等)下,降雨向下移动时坡面侵蚀程度比降雨向上移动时大.

Abstract:

Aiming to study the relationships between rainfall moving directions and soil erosion on hillslope, comparative plot-scale laboratory experiments were carried out in our study. The results showed that: shapes of the sediment concentration curves in one-day experiments were similar for the upstream-moving events, while significantly different for downstream-moving events. For events after the first in one-day experiments, there was only one peak sediment concentration when rainfall moves upstream, while two for the downtream conditions|furthermore, the range of peak sediment concentration was much larger for the upstream-moving events(6~90 g/L) than the downstream-moving events (11~68 g/L), of which standard deviation was the least in those downstream events with weak intensity (W). For both moving conditions, the equivalent sediment concentration with weak rainfall intensity showed the largest increase as the peak sediment yield increased, and strong intensity events (S) the least. It was concluded based on the characteristics analysis of sediment concentration that erosion of downstream-moving events was generally higher than the upstream-moving events under similar conditions.

出版日期: 2013-05-01
:  TV 11  
基金资助:

国家自然科学基金资助项目(40801011);浙江省自然科学基金资助项目(R5110012).

通讯作者: 许月萍,女,副教授.     E-mail: yuepingxu@zju.edu.cn
作者简介: 冉启华 (1973-), 男, 副教授, 从事水文水资源、地貌侵蚀等方面的研究工作. E-mail: ranqihua@zju.edu.cn
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冉启华,史致男,许月萍. 降雨移动方向对坡面侵蚀泥沙浓度的影响[J]. J4, 2013, 47(5): 803-811.

RAN Qi-hua, SHI Zhi-nan, XU Yue-ping. Impacts of moving rainfall on sediment concentration of soil erosion. J4, 2013, 47(5): 803-811.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.05.010        http://www.zjujournals.com/eng/CN/Y2013/V47/I5/803

[1] GILBERT E. Planning agricultural research: A sourcebook [J]. Agricultural Economics, 2003, 28(1): 76-78.
[2] MELVILLE N, MORGAN R P C. The influence of grass density on effectiveness of contour grass strips for control of soil erosion on low angle slopes [J]. Soil Use and Management, 2001, 17(4): 278-281.
[3] DEFERSHA M B, QURAISHI S, MELESSE A, et al. The effect of slope steepness and antecedent moisture content on interrill erosion, runoff and sediment size distribution in the highlands of Ethiopia [J]. Hydrology and Earth System Sciences, 2011, 15(7): 23672375.
[4] NEARING M A, LANE L J, ALBERTS E E, et al. Prediction technology for soil-erosion by water - status and research needs [J]. Soil Science Society of America Journal, 1990, 54(6): 1702-1711.
[5] ELLISON W D. Soil erosion by rainstorms [J]. Science, 1950, 111(2880): 245-249.
[6] OLSON T C, WISCILMEIER W H. Soil credibility evaluations for soils on the Blnofand erosion stations [J]. Soil Science, 1963, 27: 590-592.
[7] WISHMEIER W H. SMITH D D. Predicing rainfall erosion losses from cropland east of the rocky mountains [J]. Agriculture Handbook, 1965, 282.
[8] WISHMEIER W H, SMITH D D. Predicing rainfall erosion losses: a guide to conservation planning\
[J\]. Agriculture Handbook, 1978, (537).
[9] FOSTER G R, MEYER L D. A closed-form soil erosion equation for upland areas [J]. Colorado, 19-72.
[10] ROMKENS M J M, HELMING K, PRASAD S N. Soil erosion under different rainfall intensities, surface roughness, and soil water regimes [J]. Elsevier, 2001. 46: 103-123.
[11] NEARING M A, JETTEN V, BAFFAUT C, et al. Modeling response of soil erosion and runoff to changes in precipitation and cover [J]. Catena, 2005. 61(2/3): 131-154.
[12] NUNES J P, SEIXAS J, KEIZER J J, et al. Sensitivity of runoff and soil erosion to climate change in two Mediterranean watersheds. Part I: model parameterization and evaluation [J].Hydrological Processes, 2009. 23(8): 1202-1211.
[13] DE LIMA J L M P, SINGH V P. The influence of the pattern of moving rainstorms on overland flow [J]. Advances in Water Resources, 2002, 25(7): 817-828.
[14] KIRKBY M J, BRACKEN L J, SHANNON J. The influence of rainfall distribution and morphological factors on runoff delivery from dryland catchments in SE Spain [J]. Catena, 2005, 62(2/3): 136-156.
[15] DEFERSHA M B, MELESSE A M. Effect of rainfall intensity, slope and antecedent moisture content on sediment concentration and sediment enrichment ratio \
[J\]. Catena, 2012, 90: 47-52.
[16] KINNELL P I A. Comment on “A new splash and sheet erosion equation for rangelands” \
[J\]. Soil Science Society of America Journal, 2010, 74(1): 340-341.
[17] CHAPLOT V A M, LE BISSONNAIS Y. Runoff features for interrill erosion at different rainfall intensities, slope lengths, and gradients in an agricultural loessial hillslope [J]. Soil Science Society of America Journal, 2003. 67(3), 844-851.
[18] KINNELL P I A. The effect of slope length on sediment concentrations associated with side- slope erosion [J]. Soil Science Society of America Journal, 2000, 64(3): 1004-1008.
[19] RAN QI-HUA, SU DAN-YANG, LI PENG, et al., Experimental study of the impact of rainfall characteristics on runoff generation and soil erosion [J]. Journal of Hydrology, 2012, 424-425: 99-111.
[20] MAKSIMOV V A. Computing runoff produced by a heavy rainstorm with a moving center [J]. Soviet Hydrology, 1964, (5): 510-513.
[21]SINGH V P. Effect of the direction of storm movement on planar flow [J]. Hydrological Processes, 1998, 12(1): 147-170.
[22] DE LIMA J L M P, SINGH V P. The influence of the pattern of moving rainstorms on overland flow [J]. Advances in Water Resources, 2002, 25(7): 817-828.
[23] SINGH V P. Effect of the duration and direction of storm movement on infiltrating planar flow with full areal coverage [J]. Hydrological Processes, 2002, 16(7): 1479-1511.
[24] 冉启华,史致男,赵建均,等. 移动降雨条件下结皮对坡面产沙的影响机理 [J]. 清华大学学报:自然科学版, 2012,52(6): 821-829.
RAN Qi-hua, SHI Zhi-nan, ZHAO Jian-jun, et al. Impact of moving rainfall on soil erosion based on crust characteristcs [J]. Journal of Tsinghua University|Science and Technology,2012, 52 (6):821-829.
[25] FALAYI O, BOUMA J. Relationships between hydraulic conductance of surface crusts and soil management in a typic hapludalf [J]. Soil Science Society of America Journal, 1975, 39(5): 957-963.
[26] RIBOLZI O, PATIN J, BRESSON L M, et al. Impact of slope gradient on soil surface features and infiltration on steep slopes in northern laos [J]. Geomorphology, 2011, 127(1/2): 53-63.
[27] POESEN J. Surface sealing as influenced by slope angle and position of simulated stones in the top layer of loose sediments [J]. Earth Surface Processes and Landforms, 1986, 11(1): 1-10.
[28] LUK S H, CAI Q G, WANG G P. Effects of surface cresting and slope gradient on soil and water losses in the hilly loess region, north china [J]. Catena Supplement, 1993, 24: 29-45.

[1] 冉启华, 富强, 苏丹阳, 等. 降雨移动方向对坡面径流的影响机理[J]. J4, 2009, 43(10): 1915-1922.