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- Title
干旱风沙区平原型水库防护林带有效宽度研究.
- Authors
周建海; 张晓虹; 何有华; 孙浩峰; 徐 裕
- Abstract
In order to reasonably determine the effective width of the shelter-belt around the reservoir in the arid sandstorm area, the Jiefangcun Reservoir in Jinta County was taken as the research object, and the sediment transport in the shelter-belt with different heights and different forest belt widths were monitored with the bag-type SCC-X multi-channel wind erosion measuring instrument and the erosion reduction rate and the marginal benefit of different forest belt widths were analyzed. The results show that the sediment transport volume in the reservoir shelter-belt in the arid sandstorm area is decreased with the increase of the height from the ground and the sediment transport volume is mainly below 20 centimeters above the ground, accounting for 41.49%-62.23% of the total sediment transport volume below100 centimeters. The sediment transport amount below 80 centimeters above the ground in the forest belt accounts for about 90% of the total sediment transport amount below 100 centimeters. Therefore, low-growing and drought-resistant shrub species should be selected to build and plant the sand-fixation forest belt so as to reduce the water consumption and management costs of shelter forest irrigation. In the case that the sand source frontier protection forest is a young shrub forest, the erosion reduction rate index is the largest when the width of the forest belt is between 233 meters and 365 meters and the marginal benefit of sand resistance is the largest when the width of the forest belt is 234 meters. Therefore, the economic and reasonable width of the shrub protection forest belt in Jiefangcun Reservoir should be about 240 meters.
- Publication
Yellow River, 2020, Vol 42, Issue 8, p100
- ISSN
1000-1379
- Publication type
Article
- DOI
10.3969/j.issn.1000-1379.2020.08.020