HR: 1340h
AN: H13C-1394    [Abstracts]
TI: Application of a hydro-ecological model (RHESSys) for up-scaling of plot and flux tower measurements to MODIS GPP and evapotranspiration
AU: * Lee, B
EM: puplebr@kangwon.ac.kr
AF: Kangwon National University, Hyuja2-dong, Department of Environment science,Kangwon National University, Chuncheon, 200-701, Korea, Republic of
AU: Kang, S
EM: kangsk@kangwon.ac.kr
AF: Kangwon National University, Hyuja2-dong, Department of Environment science,Kangwon National University, Chuncheon, 200-701, Korea, Republic of
AU: Jung, E
EM: jungey@snu.ac.kr
AF: Seoul National University, Sinlim9-dong, Graduate school of environmental studies, Seoul National University, Seoul, 151-742, Korea, Republic of
AU: kim, e
EM: drummer76@empal.com
AF: Seoul National University, Sinlim9-dong, Graduate school of environmental studies, Seoul National University, Seoul, 151-742, Korea, Republic of
AU: hwang, T
EM: h7666@email.unc.edu
AF: University of North Carolina, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States
AB: Interest in quantifying carbon and water flux over large geographical areas has increased in recent years. Since water and carbon cycles in terrestrial ecosystem are strongly linked with each other, simultaneous evaluation can give us more insight on characteristics of and interactions between the cycles. In this study, we examined the flux of carbon and water by using a eco-hydrological model, Regional Hydro-Ecologic Simulation System (RHESSys), and examined suitability of applying parameters determined at a specific watershed to other watershed for broad-scale RHESSys application. RHESSys has been developed for applications in local hydrological investigations, forest productivity, and large scale water and carbon budgets for terrestrial ecosystems. In addition, we used felid data of streamflow, transpiration, Soil Water Content (SWC) and Wood Biomass Product (WBP). We used tree-ring data from 1978 to 1997 to estimate WBP. Transpiration was measured by using sap flow measurement, Thermal Diccipation Probe (TDP), first proposed by Granier (1985). The study sites were the Gwangneng National Arboretum (GN), Mt. Jumbong and Mt. Gyebang in Kangwon Province, Korea. The simulation results of GN generally agreed well with observation. RHESSys reasonably reproduced daily and yearly patterns of streamflow, transpiration, SWC, and WBP. The parameters identified at GN were applied to Mt. Jumbong and Mt. Gyebang. Simulation results of Mt. Jumbong and Mt. Gyebang were a reasonably reproduced daily data of transpiration and SWC. The GPP and evapotranspiration estimated by RHESSys simulation were utilized to test reliability of MODIS (Moderate Resolution Imaging Spectroradiometer) products. Our initial effort for multi-watershed application of RHESSys and up-scaling of field measurements showed promising results for broad-scale model application in Korea but for evaluating reliability of MODIS products.
DE: 1813 Eco-hydrology
DE: 1836 Hydrological cycles and budgets (1218, 1655)
DE: 1847 Modeling
DE: 4806 Carbon cycling (0428)
SC: Hydrology [H]
MN: 2007 Fall Meeting