Ecological Monitoring Method for Soil and Water Conservation in Small Watersheds Based on 3S Technology
To address the significant differences in data obtained by ecological monitoring methods and the low consistency of monitoring section data,this paper proposes a small watershed soil and water conservation e-cological monitoring method based on 3S technology.Firstly,set up measuring points based on the characteristics of the water and soil environment in the small watershed to observe and statistically analyze the flow rate of the small watershed.Using geometric correction method to correct the projection error of remote sensing images in maps and obtain TM images;Using the spectral characteristics of land features to classify images,extracting water points from the images for classification and filtering processing;Combining remote sensing images,assigning val-ues to the images and establishing topology management;Using GPS method for fixed-point survey,the coordi-nates of each point obtained form an accurate route map,and remote sensing interpretation is carried out based on the photos of different testing points to complete monitoring.The experimental results show that there is no signif-icant difference in the data before and after optimization,and the consistency is good.
3S technologySmall watershedSoil and water conservationEcological monitoring
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