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| Site type division and vegetation allocation in Donggou watershed of Chongli, Heibei province |
| WANG Bing1,2,3, LIU Xiyun1,2, NIU Jianzhi1,2, YANG Zhuo4 |
1. Key Laboratory of Soil and Water Conservation, National Forestry and Grassland Administration, Beijing Forestry University, 100083, Beijing, China;
2. Forestry Ecological Engineering Center of Ministry of Education, Beijing Forestry University, 100083, Beijing, China;
3. SGIDI Engineering Consulting (Group) Co., Ltd., 200093, Shanghai, China;
4. CCTEG Shenyang Engineering Company, 110066, Shenyang, China |
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Abstract [Background] The rational allocation of vegetation in Donggou Watershed in Chongli district of Hebei province is of great significance to the Green Winter Olympics. Making clear the main influencing factors of soil moisture in the watershed and classifying the site types accordingly are conducive to the rational allocation of vegetation.[Methods] In this paper, the differences of soil moisture characteristics in different slope, aspect and soil types in Donggou watershed were analyzed by field investigation, the dominant site factors affecting soil moisture were studied, and the watershed site types were classified by remote sensing technology, and the vegetation configuration of different site types in the watershed was discussed.[Results] 1) According to the "slope aspect-slope-soil type" naming method, Donggou watershed is divided into 32 site types. 2) There was no significant difference in the initial moisture content between Chestnut and Skeleton, Cinnamon and Brunisolic, but there was significant difference in the effective moisture content between Chestnut, Cinnamon, Brunisolic and that of Skeleton (P<0.05). There were no significant differences in the initial moisture content and effective moisture content of flat(0-5°),gentle(>5°-15°),incline(>15°-25°),steep slope(>25°) (P<0.05). The initial moisture content (15.26±3.09)% of the shady slope was better than that of the sunny slope (10.99±3.02)%, and the effective moisture content (30.59±4.62)% of the shady slope was better than that of the sunny slope (22.83±5.11)%. 3) For the steep slope site types, the drought-tolerant soil and water conservation forest species were mainly chosen, taking shrub and grass as supplement to reduce soil and water loss. The incline slope was planted economic forest and timber forest according to the hydrothermal conditions. The group of gentle and flat slope groups should reasonably be planned to be agricultural land.[Conclusions] Slope aspect and soil type are the main site factors that affect soil water characteristics, and the classification of site types can provide theoretical support for reasonable vegetation construction in the basin.
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Received: 23 January 2021
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