[1]YU Tao,LI Zhanbin,CHEN Yiting,et al.Analysis of Structural Characteristics of Typical Check Dam System in the Third Subregion of Loess Hilly Region[J].Research of Soil and Water Conservation,2019,26(04):26-30,35.
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Analysis of Structural Characteristics of Typical Check Dam System in the Third Subregion of Loess Hilly Region
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 04
Page number:
26-30,35
Column:
Public date:
2019-06-11
- Title:
- Analysis of Structural Characteristics of Typical Check Dam System in the Third Subregion of Loess Hilly Region
- Keywords:
- check dam system; cascade mode; water and sediment change
- CLC:
- S157
- DOI:
- -
- Abstract:
- In order to scientifically understand the structural characteristics of check dam system in loess hilly region, we summarize the characteristics of gully channel, reservoir capacity distribution, sediment deposition and water storage distribution in the third subregion of the loess hilly region, as well as analyze the cascade mode of the check dam system and the variation trend of water and sediment at the gate station. The results showed that: (1) as the channel level increased, the average channel area increased, the average groove length increased, and the average ratio decreased; the number of class Ⅰ channel small dams was the largest, the number of class Ⅱ channel medium dams was the largest, as well as the class Ⅲ and class Ⅳ channels were mainly based on backbone dams; (2) as the channel level increased, the total storage capacity, the designed flood storage capacity and the designed deposition capacity of the key dams were gradually increasing, while the total storage capacity and design flood storage capacity of medium dams and small dams gradually reduced, as well as the designed siltation capacity was first increased and then decreased; (3) the designed silt capacity of medium and small dams was almost full, while the key dams still had a large siltation capacity in the dam system of Chelugou waterhsed; (4) the upstream dam system reduced the flood control pressure of dams which are located in the downstream main ditch by holding back the flood and silt; the small and medium dams inside the dam system were silted into the ground as soon as possible, and the Chelugou dam system still had a large potential for siltation. With the construction of Chelugou check dam system, the trend of water and sediment had changed obviously in the outlet station of the watershed. The research results are intended to provide a scientific reference for the construction and management of check dams system on the Loess Plateau.
- References:
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