| 基于生态位适宜度的南方花岗岩区崩岗发生敏感性评价方法 |
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| 引用本文： | 季翔,黄炎和,林金石,蒋芳市,陈嘉林.基于生态位适宜度的南方花岗岩区崩岗发生敏感性评价方法[J].中国农业大学学报,2017,22(10):159-168. |
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| 作者姓名： | 季翔 黄炎和 林金石 蒋芳市 陈嘉林 |
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| 作者单位： | 福建农林大学 资源与环境学院, 福州 350002;福建省土壤环境健康与调控重点实验室, 福州 350002,福建农林大学 资源与环境学院, 福州 350002,福建农林大学 资源与环境学院, 福州 350002,福建农林大学 资源与环境学院, 福州 350002,福建农林大学 资源与环境学院, 福州 350002 |
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| 基金项目： | 国家自然科学基金项目（41601557；41571272）；国家科技支撑计划项目（2014BAD15B0303） |
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| 摘 要： | 为对崩岗的其敏感性进行有效评价,在对影响崩岗发生的空间因素进行识别的基础上,应用生态位适宜度模型构建崩岗发生敏感性的评价方法,并对福建省安溪县的小流域进行实证研究。结果表明:各敏感性等级中现有崩岗的发生频率和分布比率分别为0.31%、1%、1.94%和3.67%与4.55%、14.39%、28.03%和53.03%,可以看出这2个值均随崩岗发生敏感性等级的提升呈阶梯性增加,说明该评价方法科学合理;对崩岗发生敏感性贡献较大的空间因子为相对高差、粘粒含量和NDVI。由此提出防范崩岗发生的相关建议:对于敏感性较高的区域需要增加植被、缩小地形落差,对于敏感性较低的区域要严禁不合理的开山以及破坏植被的行为。
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| 关 键 词： | 生态位适宜度 敏感性 南方花岗岩区 小流域 |
| 收稿时间： | 2016/10/13 0:00:00 |
Sensitivity assessment method of collapsed gully occurrence in granite region of South China based on niche-fitness |
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| JI Xiang,HUANG Yanhe,LIN Jinshi,JIANG Fangshi and CHEN Jialin.Sensitivity assessment method of collapsed gully occurrence in granite region of South China based on niche-fitness[J].Journal of China Agricultural University,2017,22(10):159-168. |
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| Authors: | JI Xiang HUANG Yanhe LIN Jinshi JIANG Fangshi and CHEN Jialin |
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| Institution: | College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China;Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, Fuzhou 350002, China,College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China,College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China,College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China and College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China |
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| Abstract: | The collapsed gully is a threat to agricultural production and agricultural ecological environment with occurrence uncertainty,which means the sensitivity of collapsed gully occurrence plays a crucial role to this subject.A framework is proposed to evaluate the sensitivity of collapsed gully occurrence in granite region of South China based on niche-fitness model.To test this approach,one small watershed in Anxi County Fujian Province is chosen as the case study area.And the results show that the frequency and distribution ratio of collapsed gully in each sensitivity rank are 0.31%,1%,1.94%,3.67% and 4.55%,14.39%,28.03%,53.03% respectively.It means these two values increase stepwise following the rise of sensitivity rank,which proved this assessment method is scientific and reasonable.The results of correlation analysis between the sensitivity of collapsed gully occurrence and the niche-fitness of various factor show that altitude difference and clay content make more contribution to the sensitivity assessment,next for NDVI and flow accumulation,last for altitude and upper slope,which is concerned with the dispersion of each factor distribution and the correlation between factors.The proposals for the prevention work of collapsed gully were put forward according to the above results:the behavior of increasing vegetation cover and reducing altitude difference should be taken in the area of stronger sensitivity,and the behavior which could change natural terrain and destroy vegetation cover should be forbidden in the area of weaker sensitivity. |
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| Keywords: | niche-fitness sensitivity granite region of South China small watershed |
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