Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.678216 |
A simulation model of net primary production at watershed scale in hilly area of Loess Plateau, China - art. no. 62980Q | |
Xu Hongmei; Gao Qingzhu; Huang Yongmei | |
通讯作者 | Xu Hongmei |
会议名称 | Conference on Remote Sensing and Modeling of Ecosystems for Sustainability III |
会议日期 | AUG 14-16, 2006 |
会议地点 | San Diego, CA |
英文摘要 | A vegetation-soil-integrated-model (VSrM) to simulate net primary production at watershed scale was developed to explore the effect of soil water dynamic on the primary production processes in and and semi-arid in northwest China. The model coupled a soil water dynamic module and a vegetation growth module. The former is a daily time step, multi-horizon and distributed spatial model. The later included a mechanism model of stomatal conductance based on the mechanical character of guard cell, which used to reflect both the influence of soil water potential to stomatal conductance and the stomatal control to net photosynthesis and transpiration processes at leaf scale. Scaling up to canopy and watershed scale through considered the effect of canopy structure and heterogeneity of topography. The main inputs of the model includes photosynthetic characteristics of main vegetation type, metrological data, soil texture and physical properties, and DEM. The outputs are soil water of 4 soil layers, evaporation, transpiration, runoff, net primary production and biomass of leaf, stem and root. The model was used in Zhifanggou watershed, which located in forest steppe zone and belonged to hilly area of Loess Plateau, and the model validation was tested by field observation data sets and RS data sets. In the modeling experiment, simulations show to provide good approximation with field observation data. The simulated biomass of grass and sub-shrub are better than that of arbor and shrub, and the dynamic of LAI have well coherence with the results calculated by Landsat TM data. The model could reflect the processes of precipitation-runoff at the watershed, and indicate the spatio- temporal changes of soil water content. |
英文关键词 | stomatal conductance net primary production soil water dynamic simulation model hilly area of Loess Plateau |
来源出版物 | Remote Sensing and Modeling of Ecosystems for Sustainability III |
ISSN | 0277-786X |
出版年 | 2006 |
卷号 | 6298 |
页码 | Q2980-Q2980 |
ISBN | 0-8194-6377-9 |
出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | CPCI-S |
WOS记录号 | WOS:000243026400019 |
WOS类目 | Ecology ; Remote Sensing |
WOS研究方向 | Environmental Sciences & Ecology ; Remote Sensing |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/296223 |
作者单位 | (1)Natl Climate Ctr, Lab Climate Studies China Meteorol Adm, Beijing 100081, Peoples R China |
推荐引用方式 GB/T 7714 | Xu Hongmei,Gao Qingzhu,Huang Yongmei. A simulation model of net primary production at watershed scale in hilly area of Loess Plateau, China - art. no. 62980Q[C]:SPIE-INT SOC OPTICAL ENGINEERING,2006:Q2980-Q2980. |
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