STUDY OF GULLY EROSION USING METHOD OF TERRESTRIAL LASER SCANNING
Keywords:
gully erosion, gully, terrestrial laser scanner, satellite images, Mukyr river, Zhetysu AlatauAbstract
One of the fast developing methods of study of the Earth relief and another objects in the present time is the method of terrestrial laser scanning. Efficiency of the method of terrestrial laser scanning could be explained by the short period of time allowing to collect a lot of information and conduct monitoring of big territories of study. Use of terrestrial laser scanning in natural sciences and by nature study is actively developing in Western Europe, USA and another developed countries. In the article described the main stages of terrestrial laser scanning by gully erosion studies. High resolution 3D laser scanner RIEGL VZ-4000 was used to receive detailed digital model of the gullies and the data was developed with the use of software RiscanPro. In the valley of Mukyr river (Almaty region, Koksu district) in the Autumn season of the years 2017...2019 were conducted researches of gully erosion by using method of terrestrial laser scanning and satellite images. The majority of the gullies in this valley are growing and have grows in upper and deep parts and mainly due to fluvial processes. The article contains results of field and laboratory works using method of terrestrial laser scanning. The factors contributing to development of gully erosion are shown and morphometric gully erosion characteristics received on the base of modern devices and satellite images are provided. Actuality of gully erosion study in this region is determined by needs of planning of allowable loads to the environment in ecologically safe meaning. Gully erosion is most dangerous in piedmont and plain regions where in the present time the areas of erosive lands are increasing and their productivity is decreasing. The result of gully erosion processes is not only ecological (loss of fertility) damage but also economical loss (low efficiency of agricultural sector)
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