Modeling and geomorphological inversion of shallow gully erosion based on multivariate data in Imperial Mausoleum site of Weibei dryland

doi:10.13474/j.cnki.11-2246.2023.0203

Abstract

Abstract: Guanzhong Eighteenth Tang Dynasty Imperial Mausoleum is a valuable historical and cultural heritage in ancient China.In the past thousand years, soil and water loss existed in different degrees in the Imperial Mausoleum site area, which destroyed the landscape of the imperial Mausoleum.In order to protect cultural heritage, using satellitie and UAV imaging products to estimate the development rate of shallow gully erosion in the past 53 years.The volume-area relationship model and soil erosion level are established.The results showed that: ①The site area benefite from the project of returning forest and grass, the land use slope farmland continued to decrease, and the grassland and forest land increase.The NDVI index of the forest area in the lower reaches of Sima road reaches 0.8, and the ecological environment of the site area improve significantly.The level of water loss will change from the severe one in 1968 to the mild one in 2021.②In Beishan area of Guanzhong, it develops into egg shape gully and its vertical cut, with a good fitting relationship between perimeter and area.③The gully development model of the site area of Tang Emperor's Mausoleum in Guanzhong Beishan area, on the southern edge of the Loess Plateau, has a good power function relationship between area and volume, y=0.040 5x+1.493 6, and the determination coefficient is R²=0.82。 The annual development of gully cutting in the past 53 years is 0.36 m/a.The above model can be used as the gully development model in the southern edge of the Loess Plateau and the northern mountain area of Guanzhong.④ In the whole site area and its surrounding areas, the ratio of water and soil loss and soil sediment volume is 38.5∶1.The area ratio of erosion and soil deposition is 11.5∶1.

Key words: shallow gully erosion, loess hilly area, GIS, protection of Tang Imperial Mausoleum Sites

CLC Number:

P237

YANG Bo, YANG Xiaofeng, XIE Ruilian, LI Meng, REN Yitong, CHENG Jianglong. Modeling and geomorphological inversion of shallow gully erosion based on multivariate data in Imperial Mausoleum site of Weibei dryland[J]. Bulletin of Surveying and Mapping, 2023, 0(7): 69-73.

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