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| Spatial relationship between soil fertility quality and human activities accessibility in the red eroded area of southern China：A case study in Zhuxi Watershed，Changting County, Fujian Province |
| Chen Zhiqiang1, Chen Zhibiao1, Chen Haibin1, Chen Lihui2 |
| 1.College of Geographical Sciences, Fujian Normal University, 350007, Fuzhou; 2.Surveying and Mapping Institute of Zhangzhou, 363000, Zhangzhou, Fujian：China |
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Abstract Human activities accessibility plays an important role in soil fertility quality. This study were conducted in Zhuxi Watershed of Changting County, Fujian Province, the typical representative area of red eroded soil in Southern China. The spatial relationship between human activities accessibility and soil fertility quality was evaluated. After selecting ten soil fertility factors, the soil fertility quality was generated by overlaying ten factors based on 3S technique and field investigation. A compound-accessibility evaluation index was created based on relative altitude, slope from DEM, land use from SPOT images, distance to residential point and road extracted from land use, and the whole study area can be divided into 5 accessibility grades from the least reachable area to the most easily reachable area. The following conclusions were drawn from this research: 1) Soil fertility quality had an increasing tendency with the level of human activities accessibility from Medium, Difficult to Very difficult. The more frequent human activity, the relatively higher the disturbance of human activities. 2) All Very high and most of High grades distributed on the level of human activities accessibility Very easy and Easy on the lower reaches whose corresponding land use types were cropland, while other soil fertility quality exited because of violent development and utilization for good natural conditions. 3) Human activities accessibility was an important but not unique influencing factor to soil fertility quality. 4) The quantitative expression of human activities should be strengthened in the model of soil fertility comprehensive evaluation to explain the complex relations between human activities and soil fertility in red eroded soil in Southern China.
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Received: 23 July 2011
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Li Yan, Yu Pengtao, Wang Yanhui, Li Zhiyong, Liu Gefei, Pan Shuai, Li Zhenhua, Xu Lihong, Xiong Wei, Zuo Haijun. Effects of Land use change on runoff in Rouyuanchuan small basin[J]. SSWCC, 2013, 11(3): 40-46. |
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