[1]MA Yali,LI Xin,SUN Dongyuan,et al.Variation Characteristics Relation of Runoff in the Mainstream and Tributaries Between Zhouqu and Wudu Region of Bailong River[J].Research of Soil and Water Conservation,2021,28(03):94-100.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 03
Page number:
94-100
Column:
Public date:
2021-04-20
- Title:
-
Variation Characteristics Relation of Runoff in the Mainstream and Tributaries Between Zhouqu and Wudu Region of Bailong River
- Author(s):
-
MA Yali1, LI Xin2, SUN Dongyuan1, BAI Zuhui2
-
(1.College of Water Resources and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, China; 2.Gansu Survey and Design Research Institute for Water Resources and Hydropower Limited Liability Company, Lanzhou 730000, China)
-
- Keywords:
-
tributary; runoff change; trend analysis; mutation analysis; Bailong River
- CLC:
-
P333.3
- DOI:
-
-
- Abstract:
-
River runoff is an important part of water resources. It is of great significance to explore the characteristics and relations of runoff changes of the mainstream and tributaries between Zhouqu and Wudu region of Bailong River for understanding the regional water resources situation and its rational development and utilization. Based on the measured runoff data of five hydrological stations in the mainstream and tributaries of the Bailong River, we used anomaly accumulation, double accumulation curve, Mann-Kendall test to analyze and study the characteristic relationship of runoff change of the mainstream and tributaries in the Bailong River from 1981 to 2015. The results showed that: the runoff of all stations showed a downward trend overall and the significance level reached above 0.05; the trend rate of runoff reduction were -2.16, -0.84, -0.56 and -0.05 hundred million m3/decade for the main stream of zhouqu—wudu interval, Huangluba, Dangchang, Majie, and the decrease was 75.6 million m3 for the main stream between Zhouqu and Wudu in 35 years; compared with the reduction of the interval mainstream, the reduction of Gongba River accounted for 38.89%, which had a significant influence on the change of the interval mainstream; the average annual runoff of mainstream between Zhouqu and Wudu in Bailong River was 1.413 billion m3 and the interval inflow was 601 million m3/a, accounting for 42.56%, and that of Majie station in the Beiyu River was 0.99% at the minimum; the interval inflow was significantly higher than the tributary runoff; the critical years of annual runoff abrupt transition in the mainstream and the three tributaries were 1986, 1986, 1994 and 1991, respectively; the Gongba River had the greatest influence on the runoff change of the mainstream between Zhouqu and Wudu with an influence rate of 44.97%, followed by 37.74% and 16.29% for the interval inflow and Minjiang River, and the least influence was 1% for the small tributary Beiyu River.