根溪河小流域生态修复潜力评价

针对流域生态修复问题,以根溪河小流域为研究区域,选择土壤有机质、植被覆盖度、坡度、土壤侵蚀强度等作为评价指标,以ArcGIS9.0 Desktop为平台,对采样点土壤有机质进行Kriging空间插值,依评价指标模型对多源数据进行空间叠加分析.研究表明:插值预测模型能有效地拟合土壤有机质的空间分布特征,表明有机质含量主要受结构性因素的影响;叠加计算结果图反映出流域中下游生态环境具有相对脆弱性问题.并通过对结果的定量评价探讨了相应的水土保持生态修复对策.

Potentiality Evaluation of Ecological Remediation in the Small Watershed of Genxi River

According to the problem of ecological remediation,constructs evaluation index model for small watershed of Genxi River,which is mainly subject to the factors of soil organic matter,degree of plant-cover,slope,soil erosion,and so on.Based on ArcGIS,Kriging interpolation method is applied to analyze soil organic matter of the sampling sites and do spatial analysis between the datasets mentioned above,on the basis of the weighing set of factors.The result indicates that the interpolation can simulate the distribution of the oil organic matter effectively,affected by structural factors;and the output of overlaying map can reflect the frangibility of the environment in the middle and lower reaches of Genxi River reasonably,which aims to discuss the feasible countermeasure of ecological remediation by quantificational evaluation.