Evaluation of the Vegetation Coverage Resilience in Areas Damaged by the Wenchuan Earthquake Based on MODIS-EVI Data
Autor: | Weiguo Jiang, Wenjie Wang, Jing Li, Xiao-Fu Liu |
---|---|
Rok vydání: | 2017 |
Předmět: |
Engineering
ecological resilience MODIS-EVI vegetation cover earthquake recovery interval 010504 meteorology & atmospheric sciences 010501 environmental sciences 01 natural sciences Biochemistry Article Analytical Chemistry Ecological resilience Recovery rate medicine Statistical analysis Precipitation Electrical and Electronic Engineering Resilience (network) Instrumentation Restoration ecology 0105 earth and related environmental sciences Remote sensing business.industry Vegetation succession Atomic and Molecular Physics and Optics Physical geography medicine.symptom Vegetation (pathology) business |
Zdroj: | Sensors (Basel, Switzerland) Sensors; Volume 17; Issue 2; Pages: 259 |
ISSN: | 1424-8220 |
Popis: | The concept of resilience was integrated into post-earthquake ecological restoration assessments in 10 counties heavily impacted by the 2008 Wenchuan earthquake. Ecological resilience was defined as the time interval required for the vegetation coverage to recover to pre-earthquake levels in damaged areas. MODIS-EVI data from May to August in 2000 to 2016 were used to calculate the ecological resilience by fitting the curve of recovery rate (RR) versus time. The following conclusions were reached: (1) An area of 424.1 km2 sustained vegetation damage. (2) The vegetation recovery was found to be linear based on the statistical analysis of the most common components of the damaged areas; consequently, linear fitting was used to estimate the resilience. (3) In terms of vegetation coverage, 44.2% of the damaged areas have already recovered. The vast majority of damaged areas are predicted to achieve vegetation recovery by 2022, but 5.3% of the damaged areas will not recover within this time period and have no resilience. (4) The management of damaged areas near roads, rivers and mining operations, especially at elevations of 2000–2500 m, slopes greater than 30°, and precipitation levels greater than 1200 mm, should be prioritized in the future. (5) The innovations of this study include the method used to extract earthquake-related vegetation damage and the prediction of vegetation succession based on resilience. |
Databáze: | OpenAIRE |
Externí odkaz: |