HR: 1340h
AN: H23E-1668    [Abstracts]
TI: Estimating Transpiration Of Temperate Deciduous Forest In Korea Using Sap Flow Measurements And Eco-hydrological Model
AU: * JUNG, E
EM: jungey@snu.ac.kr
AF: Seoul National University, Graduate school of Environmental Studies, 82 dong, San 56-1, Sillim 9-dong, Gwanak-gu, Seoul, 151-019, Korea, Republic of
AU: Lee, B
EM: puplebr@kangwon.ac.kr
AF: Kangwon National University, Hyoja 2-dong, Gangwon-do, Chuncheon, 200-092, Korea, Republic of
AU: Kim, E
EM: drummer76@empal.com
AF: Seoul National University, Graduate school of Environmental Studies, 82 dong, San 56-1, Sillim 9-dong, Gwanak-gu, Seoul, 151-019, Korea, Republic of
AU: Lee, D
EM: dwlee@snu.ac.kr
AF: Seoul National University, Graduate school of Environmental Studies, 82 dong, San 56-1, Sillim 9-dong, Gwanak-gu, Seoul, 151-019, Korea, Republic of
AU: Kang, S
AF: Kangwon National University, Hyoja 2-dong, Gangwon-do, Chuncheon, 200-092, Korea, Republic of
AU: Lim, J
AF: Korea Forest Research institute, 57, Hoegi-dong, Dongdaemun-gu, Seoul, 130-872, Korea, Republic of
AU: Kim, J
AF: Yonsei University, Sinchon-dong, Seodaemun-gu, Seoul, 120-749, Korea, Republic of
AB: In forests, vegetation is a major factor in the hydrological cycle. Even though the studies of transpiration has been developed, transpiration in trees is still difficult to measure under natural conditions due to canopy heterogeneity, topography, and large size of trees of forest stands. In this study, transpiration was measured by using sap flow measurement, Thermal Diccipation Probe (TDP), first proposed by Granier (1985) in Gwangneung Research Forest, Pocheon-gun, Gyeonggi-do. Average estimated stand transpiration from measuring sap flow was 1.31mm/day (Maximum value : 2.31mm/day) in May and June. We compared this average stand transpiration with the simulated transpiration by eco-hydrological model, RHESSys (Regional Hydrologic Ecological Simulation System). As a result, we found simulated transpiration was highly overestimated. Thus, sap flow measurement has been underestimated transpiration relatively. This difference is possibly caused by scaling up the value from point to tree and stand level.
DE: 1807 Climate impacts
DE: 1813 Eco-hydrology
DE: 1847 Modeling
DE: 1851 Plant ecology (0476)
DE: 1852 Plant uptake
SC: Hydrology [H]
MN: 2007 Fall Meeting