1. 江西理工大学 建筑与测绘工程学院,江西,赣州,341000
2. 江西理工大学 资源与环境工程学院,江西,赣州,341000
3. 中国科学院 西北生态环境资源研究院,甘肃,兰州,730000
纸质出版:2018
移动端阅览
丁倩倩, 刘友存, 焦克勤, 等. 赣江上游典型流域水沙过程及驱动因素[J]. 水土保持通报, 2018,38(4):19-26.
DING Qianqian, Liu Youcun, JIAO Keqin, et al. Changes and Driving Factors of Runoff and Sediment Yield of Typical Watershed in Upper Reaches of Ganjiang River[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 19-26.
丁倩倩, 刘友存, 焦克勤, 等. 赣江上游典型流域水沙过程及驱动因素[J]. 水土保持通报, 2018,38(4):19-26. DOI: 10.13961/j.cnki.stbctb.2018.04.004.
DING Qianqian, Liu Youcun, JIAO Keqin, et al. Changes and Driving Factors of Runoff and Sediment Yield of Typical Watershed in Upper Reaches of Ganjiang River[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 19-26. DOI: 10.13961/j.cnki.stbctb.2018.04.004.
[目的
]
对赣江上游典型流域水沙过程及驱动因素进行分析,为该区域土壤侵蚀治理、土地利用和功能调整等工作提供科学依据。[方法
]
根据桃江流域1980—2015年逐日水沙实测资料,运用Mann-Kendall突变检验法及其它统计方法分析了桃江流域的水沙变化特征,结合水文法、双累积曲线法对降水量、径流量和输沙量三者之间的相互关系进行探讨,并以此来确定桃江流域水沙变化的驱动因素。[结果
]
①桃江流域输沙量呈现显著减小趋势,突变时间出现在2005年,径流量同样出现递减趋势,但其递减趋势不甚显著,其递减时间开始于2003年。②径流量和输沙量突变开始的时间不同,水沙特性的划分阶段亦不同:径流量可划分为1980—2002年和2003—2015年2个阶段,输沙量可划分为1980—2004年和2005—2015年两个阶段。③桃江流域径流量在2003—2015年时段内年均减少量为7.26×10
10
m
3
,输沙量在2005—2015年时段内年均减少量为8.82×10
7
t。④人类活动引起的减水量为5.77×10
10
m
3
/a,占总减水量的76.8%;减沙量为8.44×10
7
t/a,占总减沙量的95.7%。[结论
]
研究区内水沙均呈减少趋势,其中输沙量减少显著。降水与人类活动引起的减水减沙量的比值约为4∶1。
[Objective] Studying the processes and driving factors of runoff and sediment in a typical watershed in the upper reaches of Ganjiang River
to provide bases for soil erosion control
land use and function adjustment in this area.[Methods] Daily runoff
sediment and precipitation data from 1980-2015 were used in this study. The characteristics and relationships between precipitation
runoff and sediment yield were analyzed by using Mann-Kendall method
hydrological method and double mass curve
from this the driving factors of runoff and sediment yield changes were determined.[Results] ① There was a significant decrease in sediment yield
while an abrupt change appeared in 2005. From 2003
the runoff yield also showed a decreasing but not apparent trend. ② Runoff and sediment yield were different in term of the beginning time of the abrupt change. The change of runoff was divided into two phases
which were from 1980 to 2002 and from 2003 to 2015
while the sediment yield had two change phases of 1980-2004 and 2005-2015. ③ The decrease value of annual average runoff during 2003-2015 was 7.26×1010 m3. The decrease value of average annual sediment yield during the period of 2005-2015 was 8.82×107 t. ④ The runoff reduction volume caused by human activities was 5.77×1010 m3/a
accounting for 76.8% of the total; the sediment decrease was 8.44×107 t/a
accounting for 95.7% of the total sediment yield.[Conclusion] Runoff and sediment yield were all reduced
and the amount of sediment yield was reduced significantly. Either for runoff reduction or for sediment discharge
the ratios caused by precipitation and human activities was about 4:1.
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