Spatial and temporal variations of suspended sediment capacity by erosion or deposition in the Ningmeng Reach of the Yellow River and its influencing factors
Received date: 2009-12-05
Revised date: 2010-03-30
Online published: 2010-10-20
The channel variation of the Ningmeng Reach has been very remarkable in the upper Yellow River and has increased flood risk. To reveal the channel variation trend and its influencing factors the sediment budget method was adopted in this study. The Ningmeng channel was divided into 5 sub-reaches, simultaneously, the total time period was divided into the 5 time periods. The mean annual erosional or depositional suspended sediment capacity (SSC) at the 5 different sub-reaches during the different time periods was calculated and analyzed. The results show that, sedimentation strongly occurred during 1952~1959 when there was no big reservoir and during 1994~2003 when the three big reservoirs of Qingtongxia, Liujiaxia and Longyangxia had been built and the downstream channel had been adequately adjusted. The mean annual SSC is 9.588×107 t/a and 9.503×107 t/a for the two periods, respectively. Intense erosion (-6.127×107 t/a), slight deposition (0.161×107 t/a) and stronger deposition (7.475×107 t/a) respectively occurred in the periods of 1960~1968, 1969~1985 and 1986~1993. The mean annual deposited SSC is 3.45×107t/a in the Ningmeng Reach, including 0.76×107 t/a in the Ningxia reach and 2.69×107 t/a in the Neimenggu reach. The annual mean SSC deposited in the 5 downstream channel reaches in the Ningmeng Reach of the Yellow River is 0.73×107 t/a, 0.029×107 t/a, 0.084×107 t/a, 1.131×107 t/a and 1.47×107 t/a, respectively. The temporal variation of the SSC in the Ningmeng Reach of the Yellow River was mostly influenced by the decrease of suspended sediment load from the tributaries and reservoir construction, whereas, the spatial variation was mostly influenced by the interception of suspended sediment load in the Qingtongxia reservoir and adjustment of flood discharge in the Liujiaxia and Longyangxia reservoirs. The Ningmeng Reach is located in a subsidized area and the sedimentation in this river reach is the general trend. Human activities may induce channel erosion in certain periods or sub-reaches, but cannot change the general trend.
WANG Sui-ji, FAN Xiao-li, ZHAO Xiao-kun . Spatial and temporal variations of suspended sediment capacity by erosion or deposition in the Ningmeng Reach of the Yellow River and its influencing factors[J]. GEOGRAPHICAL RESEARCH, 2010 , 29(10) : 1879 -1888 . DOI: 10.11821/yj2010100016
[1] 杨忠敏,任宏斌.黄河水沙浅析及宁蒙河段冲淤与水沙关系初步研究.西北水电,2004,(3):50~55.
[2] 杨根生,拓万全,戴丰年,等.风沙对黄河内蒙古河段河道泥沙淤积的影响.中国沙漠,2003,23(2): 152~159.
[3] 路秉慧,郭德成,张亚彤,等.黄河宁蒙河段凌汛特点分析.内蒙古水利,2005,(4): 15~16.
[4] 杨淑萍,丁建军,陈晓娟,等.近13a来黄河宁夏段凌汛分析.中国沙漠,2005,25(6): 933~937.
[5] 龙虎,杜宇,邬虹霞,等.黄河宁蒙河段河道淤积萎缩及其对凌汛的影响.人民黄河,2007,29(3): 25~26.
[6] 申冠卿,张原锋,侯素珍,等.黄河上游干流水库调节水沙对宁蒙河道的影响.泥沙研究,2007,(1): 67~75.
[7] 郑广兴,罗义贤.黄河上游水库对宁夏河段防洪防凌及灌溉的影响与对策.人民黄河,1998,20(6): 4~13.
[8] Ta Wanquan, Xiao Honglang, Dong Zhibao. Long-term morphodynamic changes of a desert reach of the Yellow River following upstream large reservoirs' operation. Geomorphology, 2008, 97: 249~259.
[9] 王随继,范小黎.黄河内蒙古不同河型段对洪水过程的响应特征.地理科学进展,2010,29(4):501~506.
[10] 冉立山,王随继,范小黎,等.黄河内蒙古头道拐断面形态变化及其水沙响应分析.地理学报,2009,64(5): 531~540.
[11] 赵文林,程秀文,侯素珍.黄河上游宁蒙河道冲淤变化分析.人民黄河,1999,21(6):11~15.
[12] 侯素珍,王平,常温花,楚卫斌.黄河内蒙古河段冲淤量评估.人民黄河,2007,29(4): 21~23.
[13] 冉立山,王随继.黄河内蒙古河段河道演变及水力几何形态研究.泥沙研究,2010,(4):61~67.
[14] 王维第,程秀文,陈建军.黄河水资源利用引起的水沙变化.黄河水沙变化研究(第一卷·上册).郑州:黄河水利出版社,2002.
[15] 赵文林.黄河泥沙.郑州:黄河水利出版社,1996.
[16] 杨赉斐,吕永航,王晖.黄河上游修建大型水库后兰州至河口镇河段河道冲淤特性及其变化趋势的预测. 见:王岗,范昭.黄河水沙变化研究(第一卷). 郑州:黄河水利出版社,2002.347~367.
[17] 范小黎,王随继,冉立山.黄河宁夏河段河道演变及其影响因素分析.水资源与水工程学报,2010,21(1): 5~11.
[18] 王随继.黄河流域河型转化现象初探.地理科学进展,2008,27(2): 10~17.
[19] 王随继,冉立山.无定河流域产沙量变化的淤地坝效应分析.地理研究,2008,27(4): 811~818.
[20] 左仲国.清水河流域水沙变化及发展趋势预测.见:王岗,范昭,黄河水沙变化研究(第一卷). 郑州:黄河水利出版社,2002.439~448.
[21] 谢玉亭,许志文.祖厉河流域水利水土保持措施对黄河水沙变化的影响及发展趋势研究. 见:王岗,范昭.黄河水沙变化研究(第一卷),郑州:黄河水利出版社,2002.279~326.
[22] 杨根生.黄河石嘴山~河口镇河道淤积泥沙来源分析及治理对策.北京:海洋出版社.2002.1~90.
[23] Zahar Y, Ghorbel A, Albergel J.Impacts of large dams on downstream flow conditions of rivers: Aggradation and reduction of the Medjerda channel capacity downstream of the Sidi Salem dam (Tunisia). Journal of Hydrology, 2008, 351(3~4): 318~330.
/
| 〈 |
|
〉 |