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[1]LI Fugen,XIN Xiaozhou,LI Xiaojun.Assessment of Restoration of Vegetation Net Primary Productivity in Earthquake Disaster Area[J].Research of Soil and Water Conservation,2017,24(06):139-146.

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Assessment of Restoration of Vegetation Net Primary Productivity in Earthquake Disaster Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 06 Page number: 139-146 Column: Public date: 2017-11-24

Title:: Assessment of Restoration of Vegetation Net Primary Productivity in Earthquake Disaster Area

Author(s):: LI Fugen^1,2, XIN Xiaozhou¹, LI Xiaojun^1,2; 1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: NPP; remote sensing; GIS; CASA model; restoration

CLC:: P237

DOI:: -

Abstract:: The occurrence of major disasters such as earthquake has caused great damage to the vegetation and ecological environment. The net primary productivity (NPP) of vegetation can reflect the growth status of green plants, and evaluation on the effect of vegetation restoration on primary productivity in earthquake stricken areas is helpful to understand the situation and trend of vegetation restoration after earthquake. Based on the multi-phase remote sensing data (e. g. MODIS and TM), and combination of the meteorological information and other data as auxiliary data, by means of RS and GIS, we improved the CASA model and used it to estimate NPP of three years before and after the disaster area. Results show that the total vegetation NPP was 982.7 million gC/a after the disaster in 2009, decreased by 31.99 percent compared to the previous disaster in 2007, increased by 28.55% due to recovery in 2011 compared to 2009, but still 12.57% lower than in 2007, two years after the quake, vegetation net primary productivity of the disaster area recovered somewhat, but not reached the level before the earthquake; according to the spatial distribution of vegetation NPP, the closer to the center of the earthquake is, the greater the degree of vegetation NPP reduction is, the worse the recovery ability is. The comparison results show that the improved model has high reliability, which can provide scientific basis for the relevant departments to develop the ecological restoration and ecological restoration plan and implementation.

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