Journal of Natural Resources, Volume. 35, Issue 3, 698(2020)
Land suitability evaluation and reconstruction of settlements in the pastoral area of Tibetan Plateau: A case study of Nagqu county in Northern Tibet
Fig. 3. Distribution of settlements in different grades suitable areas in various townships of Nagqu county
Fig. 4. Schematic diagram of the unreasonable layout of settlement in Nagqu county
Table 1. Land suitability evaluation index system of settlements in Nagqu county
View tableView in ArticleTable 1. Land suitability evaluation index system of settlements in Nagqu county
目标层 准则层 指标 分级标准 Ⅰ(1分) Ⅱ(0.75分) Ⅲ(0.50分) Ⅳ(0.25分) 禁建区 那曲县
聚落用
地适宜
性评价自然地
理条件海拔/m 4100~4300 4300~4500 4500~4700 4700~5000 >5000 坡度/(°) <3 3~8 8~15 15~25 >25 地形起伏度/m <15 15~30 30~45 >45 >80 植被覆盖度/% 100~80 80~60 60~40 40~20 — 距水系距离/m <1000 1000~2000 2000~3000 >3000 — 生态环
境因素冻融侵蚀敏感性 不敏感 轻度敏感 低度敏感 中度敏感 高度敏感 水土流失敏感性 不敏感 轻度敏感 低度敏感 中度敏感 高度敏感 自然灾害敏感性 不敏感 轻度敏感 低度敏感 中度敏感 高度敏感 生境脆弱性 不脆弱 轻度脆弱 低度脆弱 中度脆弱 高度脆弱 社会经
济因素距国道、省道距离/m <1000 1000~2000 2000~3000 >3000 — 距县道和其他道路距离/m <500 500~1000 1000~1500 >1500 — 距乡镇中心
距离/m距县城距离 <2000 2000~4000 4000~6000 >6000 — 距一般乡镇距离 <1500 1500~3000 3000~4500 >4500 — 距火车站点距离/m <1500 1500~3000 3000~4500 >4500 —
Table 2. Distribution of different grades suitable areas for settlements in various townships of Nagqu county
View tableView in ArticleTable 2. Distribution of different grades suitable areas for settlements in various townships of Nagqu county
行政单元 适宜区 较适宜区 一般适宜区 较不适宜区 不适宜区 禁建区 面积/km2 比例/% 面积/km2 比例/% 面积/km2 比例/% 面积/km2 比例/% 面积/km2 比例/% 面积/km2 比例/% 那曲县 848.3 5.2 1095.4 6.8 3749.9 23.1 1996.1 12.3 2616.1 16.1 5910.3 36.4 那曲镇 274.5 17.2 127.1 8.0 688.9 43.2 261.2 16.4 213.7 13.4 30.0 1.9 孔玛乡 123.4 13.6 121.2 13.3 89.1 9.8 68.4 7.5 337.8 37.2 168.8 18.6 罗玛镇 118.9 7.4 39.9 2.5 660.1 40.8 424.6 26.3 143.8 8.9 229.0 14.2 古露镇 96.8 10.3 22.8 2.4 98.1 10.5 62.8 6.7 67.5 7.2 589.6 62.9 香茂乡 70.0 3.3 27.5 1.3 718.7 34.0 275.6 13.0 78.3 3.7 942.9 44.6 洛麦乡 42.9 4.7 116.9 12.9 14.0 1.5 71.8 7.9 110.7 12.2 549.9 60.7 达萨乡 39.2 2.2 104.9 6.0 164.8 9.4 300.3 17.0 543.6 30.8 609.5 34.6 达前乡 37.0 4.8 176.0 22.7 22.2 2.9 39.2 5.1 310.7 40.1 189.8 24.5 尼玛乡 18.7 2.5 122.5 16.2 3.4 0.4 19.1 2.5 310.7 41.1 281.2 37.2 色雄乡 18.1 3.6 155.7 31.3 0.4 0.1 24.2 4.9 120.8 24.3 178.7 35.9 油恰乡 8.7 0.6 75.4 5.0 0.4 0 32.6 2.2 88.5 5.9 1292.6 86.3 那玛切乡 — — 4.5 0.2 1281.9 45.2 413.3 14.6 286.5 10.1 848.3 29.9
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Hai-peng ZHANG, Ren-wei HE, Yun-wei LIU, Fang FANG. Land suitability evaluation and reconstruction of settlements in the pastoral area of Tibetan Plateau: A case study of Nagqu county in Northern Tibet[J]. Journal of Natural Resources, 2020, 35(3): 698
Received: Dec. 16, 2018
Accepted: --
Published Online: Sep. 25, 2020
The Author Email: Ren-wei HE (herenweiyan@163.com)
