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河溪生态系统自然性评价指标体系
引用本文:高甲荣,王芳,朱继鹏,王敏.河溪生态系统自然性评价指标体系[J].中国水土保持科学,2006,4(5):66-70.
作者姓名:高甲荣  王芳  朱继鹏  王敏
作者单位:北京林业大学,水土保持与荒漠化防治教育部重点实验室,100083,北京
摘    要: 从河溪生态系统自然性评价的意义出发,以北京市南沙河为案例,确定河溪自然性评价的3大类指标,即河溪生态特征指标、地貌学指标、水文学指标。在3大类指标中,分别给出各自具有可操作性的亚指标,详细介绍亚指标的计算方法和分级标准。采用指标数量化的评价方法—多目标线性加权函数法,计算河溪自然性综合指数—自然度。应用这种方法对南沙河自然状况进行综合评价的结果是,南沙河整体受到了较为严重的人为干扰,自然状况较差。通过河溪自然性评价图直观反映了南沙河的受扰程度。

关 键 词:河溪生态系统  自然性  评价指标体系  南沙河
收稿时间:2005-12-10
修稿时间:2006-08-20

Assessment indexes of naturalness of stream ecosystem
Gao Jiarong,Wang Fang,Zhu Jipeng,Wang Min.Assessment indexes of naturalness of stream ecosystem[J].Science of Soil and Water Conservation,2006,4(5):66-70.
Authors:Gao Jiarong  Wang Fang  Zhu Jipeng  Wang Min
Institution:Beijing Forestry University,Key Laboratory of Soil and Water Conservation &; Desertification Combating,Ministry of Education,100083,Beijing,China
Abstract:Assessment of naturalness of stream ecosystem is an important proportion of near natural stream control. Naturalness of stream ecosystem refers to the state of a stream with no human disturbance to the process of material cycling and energy flowing in a stream ecosystem. Assessment of naturalness of stream ecosystem is to determine the deterioration degree of the ecosystem and deliver early warning or provide information for the decision-making process to maintain sustainability of streams. Here taking the Nansha River as a research object a theoretical framework is established to design an indexes system, including the subsets of ecological indexes, landform indexes and hydrologic indexes. A diagram of naturalness assessment is designed. In detail, among the three subsets, the ecological indexes include riparian vegetation, species diversity, individual scale of plant, biomass, width and entertainment; the landform indexes consist of plane features, diversity of transects, permeability of riverbed, erosion and deposition of river course and habitat diversity; the hydrology indexes are based on the volume variation of flow from natural state, depth and turbidity. According to the theories and methods of multi-objective linear weighting function, the comprehensive indexes of natural condition of stream is established, that is, naturalness degree. By analyzing these indexes, the naturalness condition of Nansha River is assessed, that is the naturalness condition of Nansha River was poor. Therefore, more attention should be paid to the disturbed streams, and further study is necessary to be carried out in this field.
Keywords:stream ecosystem  naturalness  indexes of assessment  Nansha River
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