[1]HOU Lili,YIN Shan,DU Wala,et al.Simulation and Spatial-Temporal Analysis of Vegetation NPP in Hunshandake Sandy Land Based on CASA Model[J].Research of Soil and Water Conservation,2020,27(02):165-171.
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Simulation and Spatial-Temporal Analysis of Vegetation NPP in Hunshandake Sandy Land Based on CASA Model
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
165-171
Column:
Public date:
2020-03-30
- Title:
- Simulation and Spatial-Temporal Analysis of Vegetation NPP in Hunshandake Sandy Land Based on CASA Model
- CLC:
- TP79; Q948
- DOI:
- -
- Abstract:
- In order to recognize the net primary productivity(NPP)and ecological environment of Hunshandake sandy land in the context of ecological engineering implementation, based on the modeling idea of CASA model, meteorological data and remote sensing data were used to estimate the monthly NPP value of the sandy land in the period 2000—2016 growing season(April—October). The spatial and temporal distribution characteristics and trends of sand NPP in 17 years were analyzed. The results showed that:(1)NPP of Hunshandake Sandy Land had a fluctuating upward trend from 2000 to 2016, and the average annual value of NPP was 282.42 g/(m2·a);(2)the seasonal variation of NPP value was obvious, the NPP value in spring showed the downward trend, and showed the upward trend both in the summer and autumn, The NPP change in summer was basically consistent with the annual NPP change trend; from the perspective of monthly changes, the highest value was found in July, the NPP value accumulated in July and August accounted for 51.57% of the total;(3)in terms of space, the overall NPP increased from west to east, and the area of 78.2% showed the increasing trend, 12.17% of regional growth is significant or extremely significant, the central and western regions had experienced the slow growth. The results of this study are important for guiding the protection and restoration of future sandy ecosystems.
- References:
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Last Update:
2020-02-25