[1]ZHANG Yong-ling,HAO Cheng-yuan.Temporal-spatial Distribution Characteristics of Vegetation NPP in the Xijiang River Catchment Based on Remote Sensing and CASA Model[J].Research of Soil and Water Conservation,2010,17(05):101-104.
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Temporal-spatial Distribution Characteristics of Vegetation NPP in the Xijiang River Catchment Based on Remote Sensing and CASA Model
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
17
Number of periods:
2010 05
Page number:
101-104
Column:
Public date:
2010-10-20
- Title:
- Temporal-spatial Distribution Characteristics of Vegetation NPP in the Xijiang River Catchment Based on Remote Sensing and CASA Model
- Keywords:
- net primary productivity; spatial and temporal distribution pattern; CASA model; Xijiang River catchment; remote sensing
- CLC:
- Q945.11;TP79
- DOI:
- -
- Abstract:
- Based on the remote sensing data of EOS/MODIS and meteorology data, the spatial and temporal variation of the net primary productivity in Xijiang River catchment was analyzed by CASA model. The results showed that the range of NPP in the Xijiang River catchment was 400～500 gC/(m2·a), and average annual NPP in the upper reaches of the Xijiang River was 200～300 gC/(m2·a), which was much lower than that in the middle and lower reaches of the Xijiang River. The average annual NPP in the upper reaches was 500～600 gC/(m2·a), and certain regions is more than 800 gC/(m2·a). The seasonal change of the NPP in the Xijiang River catchment was marked. The NPP was high in summer, and next-high in spring and autumn, and lowest in winter. The spatial discrepancy of NPP in the Xijiang River catchment was obvious. The average NPP was lower in the upper reaches than in the middle and lower reaches in the flood season. But from January to March the NPP is higher in the upper reaches especially in the Nanpan River catchment than in the middle and lower reaches. The spatial characteristics of NPP also showed that spatial discrepancy was big in flood season and little in winter.
- References:
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1900-01-01