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.
基于遥感和CASA模型的西江流域NPP时空分布特征研究
- 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
- 分类号:
- Q945.11;TP79
- 摘要:
- 基于EOS/MODIS遥感资料，采用CASA模型分析西江流域陆地植被净第一性生产力（NPP）的时空变化特征。结果表明：西江流域平均植被NPP为400～500 gC/（m2·a），上游地区偏低，为200～300 gC/（m2·a），中下游地区较高，平均500～600 gC/（m2·a），部分地区可达到800 gC/（m2·a）以上；植被NPP季节变化显著，夏季最高，春、秋季节次之，冬季最低小；西江流域植被NPP的空间差异明显，在5-10月，上游地区植被NPP较低，中下游地区较高；在1-3月，上游地区尤其是南盘江流域的植被NPP较高，中下游地区尤其是中游地区明显较少。西江流域植被NPP的空间特征还表现在汛期空间差异大，枯水期空间差别小。
- 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.
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备注/Memo
收稿日期:2010-6-19;改回日期:2006-2-25。
基金项目:河南理工大学博士基金（B2008-68）
作者简介:张永领（1975- ），男，山东成武人，博士，副教授，主要从事气候与环境研究。E-mail：zhyongling@hpu.edu.cn
通讯作者:孙启祥（1968- ），安徽人，男，副研究员，博士，主要从事森林生态学的研究，已发表文章30余篇。