摘要
水土保持功能重要性是国土空间“双评价”工作中重要的评价指标之一。基于多源数据的县级水土保持功能重要性评价方法,为开展县级国土空间“双评价”提供借鉴与参考。以榆林市横山区为例,采用精度更高、现势性更强的多源数据,分别运用自然资源部《双评价指南》中的“双评价法”和生态环境部《生态保护红线划定指南》中的“模型评价法”,对区域水土保持功能重要性进行评价。结果显示:(1)“模型评价法”较“双评价法”更符合地区实际情况;(2)两种方法均受地形因子影响更大;(3)“双评价法”更适用于地势平缓区域,“模型评价法”更适用于地势起伏较大区域。研究建议通过两种方法的集成并采用精度更高、现势性更强的数据以获得县级尺度水土保持功能重要性评价结果,既有效化解了地形地貌多样性对评价结果的影响,又有利于实现对省市“双评价”成果的校核和修正。
The importance of soil and water conservation function was one of the important evaluation indexes in the“double evaluation”of land and space.The evaluation method of the importance of soil and water conservation function at county level based on multi-source data was studied in order to provide reference for“double evaluation”of land and space at county level.Taking Hengshan District of Yulin City as an example,adopting multi-source data with higher accuracy and stronger current situation,this paper evaluated the importance of regional water and soil conservation function by using the“double evaluation method”in the“Double Evaluation Guide”of the Ministry of Natural Resources and the“model evaluation method”in the“Technical Guide for Delimiting Ecological Protection Red Line”of the Ministry of Ecology and Environment.The results were shown as follows:(1)the“model evaluation method”was more in line with the actual situation of the region than the“double evaluation method”;(2)this two methods were more affected by terrain factors;(3)the“double evaluation method”was more suitable for the area with flat terrain,and the“model evaluation method”was more suitable for the area with large fluctuation.It was suggested that the integration of the two methods and the use of more accurate and current data to obtain the evaluation results of the importance of soil and water conservation function at the county level could not only effectively resolve the impact of topography and geomorphology diversity on the evaluation results,but also be conducive to the verification and revision of the results of the“double evaluation”of provinces and cities.
作者
张利君
ZHANG Li-jun(Shaanxi Institute of Urban&Rural Planning and Design,Xi’an 710021,China)
出处
《国土资源科技管理》
2021年第3期60-72,共13页
Scientific and Technological Management of Land and Resources
关键词
水土保持功能
模型评价法
双评价
国土空间规划
多源数据
重要性评价
soil and water conservation function
model evaluation method
double evaluation
territorial space planning
multi-source data
importance evaluation
