Plain irrigation district pump gate point position and type identification method based on GF-2 and Lidar data

Abstract

The invention discloses a plateau irrigation area pump gate point position and type identification method based on GF-2 and Lidar data, and the method comprises the following steps: taking a plateau irrigation area as a research area, and obtaining a GF-2 remote sensing image of the research area; extracting a research area ditch distribution vector diagram; extracting a ditch center line and extending the ditch center line; grading the ditch according to the characteristics of the ditch in the research area; performing intersection on channels of different grades to obtain the positions of pump brake points in the research area; carrying out hydrological module analysis in ArcGIS by utilizing Lidar data of a research area to obtain ditch network vector data with a flow direction; and judging the research area pump gate type according to the ditch network vector data with the flow direction, the research area pump gate point position and the ditch grade vector data. According to the method, the influence of manual regulation on the hydrological connectivity of the plain irrigation area can be known, and a referenceable scientific basis is provided for improving the health conditionof the rural ditch ecosystem and improving the overall allocation capability of water resources.

Description

technical field [0001] The invention belongs to the field of hydrology, and in particular relates to a method for identifying the position and type of a pump gate point in a plain irrigation area based on Gaofen No. 2 and Lidar data. Background technique [0002] The water flow movement in the canal network of the plain irrigation area is complex, coupled with the impact of irrigation water conservancy projects and human management, the water system is not connected, and the flow is not smooth, which leads to dysfunction in the area and has different degrees of impact on the surrounding natural ecosystems. The location of the pump gate facilities in the plain irrigation area is scattered. At present, there is no method that can quickly collect the information of the pump gate in the plain irrigation area. The type provides a good data basis. Identifying and judging the location and type of the pump gate point in the plain irrigation area can understand the impact of human re...

AI Technical Summary

Problems solved by technology

[0002] The water movement of the canal network in the plain irrigation area is complex, coupled with the impact of irrigation water conservancy projects and human management, the water system is not connected, and the flow is not smooth, which leads to dysfunction in the area and has different degrees of impact on the surrounding natural ecosystems

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