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.
基于CASA模型的浑善达克沙地植被NPP模拟及时空分析
- Title:
- Simulation and Spatial-Temporal Analysis of Vegetation NPP in Hunshandake Sandy Land Based on CASA Model
- 文章编号:
- 1005-3409(2020)02-0165-07
- 分类号:
- TP79; Q948
- 文献标志码:
- A
- 摘要:
- 为了解生态工程实施下浑善达克沙地植被净初级生产力(NPP)及沙地生境情况,基于CASA模型建模思路,利用气象数据、遥感数据估算了沙地2000—2016年生长季(4—10月)的逐月NPP值,并分析了17年内沙地NPP的时空分布特征及变化趋势。结果表明:(1)浑善达克沙地2000—2016年NPP呈波动上升趋势,NPP多年均值为282.42 g/(m2·a)。(2)NPP季节变化明显,春季NPP呈下降趋势,夏季和秋季均呈上升趋势,夏季NPP变化与全年NPP变化趋势基本一致,从月变化来看,NPP值在7月达到峰值,7月、8月份积累的NPP占总量的51.57%。(3)空间上NPP整体由西向东递增,78.2%的面积呈增长趋势,12.17%的区域增长显著或增长极显著,中西部地区增长缓慢。研究结果对指导未来沙地生态系统的保护和恢复具有重要意义。
- 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.
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备注/Memo
收稿日期:2019-03-31 修回日期:2019-04-28 资助项目:内蒙古师范大学研究生科研创新基金(CXJJS18101); 科技基础资源调查项目(2017FY101301-4); 国家自然科学基金(61631011) 第一作者:侯丽丽(1995—),女,山西孝义人,硕士研究生,研究方向为灾害监测与防治。E-mail:245709243@qq.com 通信作者:银山(1963—),男(蒙古族),内蒙古通辽人,博士,教授,主要从事荒漠化和自然灾害研究。E-mail:yinshan@imnu.edu.cn