摘要
浅沟作为黄土区坡面重要侵蚀形式之一,其侵蚀量占粱峁侵蚀产沙量的46%。浅沟的发生发展在坡面侵蚀中占据重要地位,如果得不到控制和治理,浅沟发育成切沟后,将吞噬更多可利用土地资源。以黄土丘陵沟壑区野外拍摄的照片资料为研究对象,通过ERDAS软件运用AOI分析法处理照片资料,提出浅沟信息识别问题的解决方案。据此方法,获得识别浅沟信息的规律,即处于浅沟的AOI的RGB三基色构成遵循DNR>DNG的规律,处于峁坡的小斑三基色构成遵循DNR<DNG的规律。证明了数码照相法应用于浅沟信息识别的可行性,提出计算机自动获取浅沟信息的新理论,在坡面侵蚀治理和遥感软件二次开发上有明显应用价值。
Ephemeral gully is an important form of slope erosion occurring in the Loess region,accounting for 46% of the total amount of soil erosion quantity.The development of ephemeral gully plays an important role in slope erosion.Without effective control and governance,ephemeral gully can develop into cut ditch,which will devour more available land resources.Based on photo shots on Loess Plateau hills region,a solution to recognize ephemeral gully on photos was introduced,in which the photo data were processed by using Area of Interest（AOI） analysis through ERDAS.It was concluded that the ephemeral gully obeyed the law of DNR〉DNG in RGB color value of AOIs,and that the loess hills obeyed the law of DNR〈DNG.The results demonstrated the practicability of digit photos to be used to extract microtopography data.It provided a new method to investigate ephemeral gully by computer automatically.This theory has obvious practical value in the management of slope erosion and second development of remote sensing software.
出处
《西北林学院学报》
CSCD
北大核心
2012年第3期187-192,共6页
Journal of Northwest Forestry University
基金
国家"十二五"科技支撑计划项目(2011BAD38D06)
关键词
浅沟
照相法
AOI分析
ephemeral gully
digital camera
AOI analysis
