Relationship between farmland shelterbelt and gully erosion in the black soil region of Northeast China
WANG Wenjuan, DENG Rongxin, HAO Lijun
1. College of Resources and Environment Sciences, Henan University of Economics and Law, 450002, Zhengzhou, China;
2. School of Resources and Environment, North China Institute of Water Resources and Electric Power, 450011, Zhengzhou, China;
3. School of Architecture, North China Institute of Water Resources and Electric Power, 450011, Zhengzhou, China
Abstract：[Background] The black soil region in Northeast China is one of the most important marketable grain basis. The serious soil erosion brings crucial challenges to the production of marketable grain. Farmland shelterbelt is a key part of the Three Norths Forest Protection System in Northeast China, which plays a positive role in the prevention and control of soil erosion. The study on the effect of shelterbelt on gully can provide scientific insights into gully erosion control.[Methods] Firstly, the typical black soil region was chosen as the study area in Keshan County, Northeast China, and the distribution of gully and farmland shelterbelt was derived by interpreting the SPOT5 imagery in 2007 and TM imagery in 2008, respectively. Then, the effect of farmland shelterbelt on gully erosion was analyzed, using the spatial analysis and mathematical statistics methods.[Results] Generally, the density of farmland shelterbelts increased from northeast to southwest, while the variation law was the opposite for the density of gully. The highest density of farmland shelterbelt occurred in the western and northwestern regions, with the density larger than 1 400 m/km2. And the highest density occurred in northeastern region for gully, >800 m/km2. Furthermore, the defense effect of farmland shelterbelt on gully erosion varied with the defense distance. When the distance was shorter than 120 m, no obvious difference existed for the defense effect. When the distance ranged from 120 to 240 m, the defense effect decreased linearly with the increase of distance. When the distance was longer than 240 m, the defense effect decreased distinctly. Besides, the shelterbelt and gully density showed a highly linear relationship when the shelterbelt density ranged from 500 to 1 300 m/km2. However, the change of gully density was not obvious when the shelterbelt density was higher than 1 300 m/km2.[Conclusions] The slope, distance from the gully, and density of farmland shelterbelt were all import factors to the effect of farmland shelterbelt on gully erosion. The effect varied under different conditions of the three above mentioned factors. The farmland shelterbelt should be better planted in regions with the slope less than 8°, less than 120 m far away from the gully, and with the density ranging 1 100-1 300 m/km2 in black soil region of Northeast China. This work may provide a certain scientific suggestion for the erosion prevention and management.
王文娟1, 邓荣鑫2, 郝丽君3. 东北黑土区农田防护林与沟谷侵蚀关系[J]. 中国水土保持科学, 2017, 15(6): 44-51.
WANG Wenjuan, DENG Rongxin, HAO Lijun. Relationship between farmland shelterbelt and gully erosion in the black soil region of Northeast China. SSWC, 2017, 15(6): 44-51.
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2017, Vol. 15 
