Suitability Evaluation of Ecological Control Measures for Typical Small Watershed Soft Rock Area Based on TVDI and NDVI changes

DOI

10.2991/aebmr.k.210409.032How to use a DOI?

Keywords

LUCC, TVDI, NDVI, Hurst, Soft Rock Area, Small watershed

Abstract

The spatiotemporal variation characteristics of soil moisture and vegetation change are important factors to monitor the effect of water and soil loss control in a watershed. Based on the multi-source remote sensing data from 2015 to 2019, the temporal and spatial variation laws of LUCC, TVDI and NDVI in small watershed are analyzed, and the relationship and change trend of TVDI and NDVI are analyzed by Hurst index. The results showed that: (1) after 5 years of management, the spatial structure of land use, soil moisture TVDI and vegetation coverage NDVI have changed significantly, and the differences of soil moisture and vegetation coverage among different land use types are obvious. The recovery of trees and shrubs accounted for 43.52% of the total area of the small watershed. (2) The area of extremely humid area in the study area increased significantly, and the extreme drought was alleviated. (3) The mean Hurst index of TVDI and NDVI were 0.47 and 0.62, respectively. The results showed that soil moisture in small watershed increased as a whole, but the area of soil moisture increased, indicating that the carrying capacity of soil moisture to vegetation decreased in the process of watershed management, which should be paid attention to. The area of NDVI continuous improvement accounted for 43.62%, and the area of degradation to improvement accounted for 9.24%. The overall vegetation situation in the study area continued to turn better. (4) The statistical order of the suitability area of small watershed management was as follows: high suitable area > more suitable area > unsuitable area. The results show that many years of soil and water conservation measures have greatly improved the regional climate and water conservation capacity, but there are also high vegetation arid areas and large areas of unsuitable areas, which are particularly worthy of attention. It is necessary to reflect the idea of regional soil and water bearing capacity based on water determined vegetation in the future governance planning and allocation, and comprehensively consider the soil, terrain and other factors in the Soft Rock Area we should adjust the management mode in time, scientifically select suitable tree species and measures, and fully consider the necessity, adaptability and sustainability of ecological construction.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Jing Liu
AU  - Li-Ga Bai
AU  - Shan Yin
AU  - Guo Jianyin
PY  - 2021
DA  - 2021/04/12
TI  - Suitability Evaluation of Ecological Control Measures for Typical Small Watershed Soft Rock Area Based on TVDI and NDVI changes
BT  - Proceedings of the 9th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2020)
PB  - Atlantis Press
SP  - 205
EP  - 211
SN  - 2352-5428
UR  - https://doi.org/10.2991/aebmr.k.210409.032
DO  - 10.2991/aebmr.k.210409.032
ID  - Liu2021
ER  -