[1]NING Jing,YANG Zi,JIANG Tao,et al.The Coupling Laws Between Gully Erosion of Cultivated Lands with Different Ridge Directions and Terrain in Northeast Black Soil Region of China[J].Research of Soil and Water Conservation,2016,23(03):29-36.
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The Coupling Laws Between Gully Erosion of Cultivated Lands with Different Ridge Directions and Terrain in Northeast Black Soil Region of China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 03
Page number:
29-36
Column:
Public date:
2016-06-28
- Title:
- The Coupling Laws Between Gully Erosion of Cultivated Lands with Different Ridge Directions and Terrain in Northeast Black Soil Region of China
- Keywords:
- gully erosion; tillage ridge direction; terrain; coupling laws; northeast black soil region of China
- CLC:
- S157
- DOI:
- -
- Abstract:
- With the long-term over-cultivating and continuous cropping in the northeast black soil region of China, it has been a severe problem that the erosion gullies cut up the cultivated land surface. We took two towns in Bin County of Heilongjiang Province as the typical areas. The spatial distribution and the coupling laws between gully erosion of cultivated lands with different ridge directions and terrain in regional scale were studied based on the GIS and RS technology, integrated ridge direction, erosion gully, DEM data, global spatial autocorrelation, sample of grid and so on. The results showed that: first, the spatial agglomeration of gully erosion was not the same in different towns, erosion degree of the dominant ridge direction in cultivated land was the most serious; second, the distribution of ridge direction in cultivated land showed an obvious spatial autocorrelation, the different spatial distribution of ridge direction was the feedback toward the terrain conditions, and the reasonable spatial distribution of ridge direction played a role in reducing gully density; third, gully density of different ridge directions in cultivated lands increased first and then decreased with the elevation rising in addition to askew ridge of Tangfang Town. The regularity of optimal ridge direction in different elevation levels was not obvious in Tangfang Town, askew ridge tillage in any elevation level was optimal in Sanbao Town; fourth, the interaction between slope length and slope gradient was significant, showing that the horizontal ridge tillage was optimal under the condition of ‘small slope gradient’ + ‘small slope length’ or ‘big slope gradient’ + ‘small slope length’, and the askew ridge tillage was optimal under the condition of ‘small slope gradient’ + ‘big slope length’ or ‘big slope gradient’ + ‘big slope length’ in both towns; fifth, askew ridge tillage has significant effect on water and soil conservation in rolling hill regions of black soil area.
- References:
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1900-01-01