التفاصيل البيبلوغرافية
| العنوان: |
Construction and Simulation of Frog-ways Based on Hydraulic Characteristics of Curved Channels. (English) |
| المؤلفون: |
BI Bo, CHEN Jing, CHEN Dan, HONG Da-lin, JIN Qiu, WANG Xiao-jun, BI Li-dong |
| المصدر: |
China Rural Water & Hydropower; 2024, Issue 1, p8-15, 8p |
| مصطلحات موضوعية: |
IRRIGATION efficiency, IRRIGATION farming, SUSTAINABLE development, IRRIGATION water, AGROBIODIVERSITY, HYDRAULIC structures |
| مصطلحات جغرافية: |
CHINA |
| مستخلص: |
Green and sustainable development of irrigated agriculture and protec tion of agricultural biodiversity are the inevitable require -ments for the construction of modern irrigated districts in China. However, in order to ensure the efficient utilization of irrigation water, the construction of irrigation channels has been dominated by hard engineering, which has caused the loss and fragmentation of amphibian habitat, and the damage for ecological environment of the irrigation districts. The construction of amphibian corridors in irrigation channels is an important way to improve the connectivity of agricultural landscape and the migration efficiency of frogs in farmland. This paper innovatively applies the hydraulic characteristics of curved channels to the research on ecological channels, builds the curved irrigation channel models, conducts numerical simulation experiment, analyzes the trajectory of frogs at the curved irrigation channels, proposes the design of engineered modifications to allow frogs to escape from field concrete ditches. To evaluate the effects of engineered modification on the effectiveness of frog-ways and the water transfer efficiency of irrigation channels, the paper compares the water flow pattern and calculates the head oss. By carrying out numerical simulation tests, the paper obtains the flow movement law of the concrete-lined irrigation channels with different bend angles, and the flow dynamic axis and velocity distribution are compared. As a result, the slow flow zone and the transverse circulation are found. The locations suitable for amphibian corridors to be built vary when the curvature of the curve changes. The numerical simulation and head loss calculation results show that the amphibian corridors in the bend has no obvious influence on flow pattern and water transfer efficiency, and the head loss in bend is about 3.83X10"4 m, which can ensure the safe and unobstructed water flow. This study is expected to provide a scientific reference and technical support for the ecological reconstruction of end irrigation channel systems. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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