An approach of coupling topographic indices to dynamic ecosystem modelling

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

The dynamic ecosystem model LPJ-GUESS combines sophisticated plant physiological and biogeochemical processes and has been successfully used in predicting vegetation dynamics at different scales. However, the water cycling is limited to vertical water movement between the atmosphere plant-soil. Thus we have developed an enhanced version of LPJ-GUESS (called LPJ-DH) by coupling water routing and lateral water fluxes. The fundamentals are based on the spatial variability of topographic indices, calculated from digital elevation models (DEM). The runoff outputs from LPJ-DH and LPJ-GUESS were compared and the newly introduced hydrology scheme showed a possible advantage in representing the drainage network and topographic effects on water redistribution. The general increase of plant transpiration was also found over the catchment by LPJ-DH, and we demonstrated that the plant transpiration modelled by LPJ-DH was in line with observed data. Overall, the study demonstrated the feasibility and advantages of incorporating topographic effects on water redistribution within the frame of LPJ-GUESS.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Geography

Keywords

  • surface runoff, LPJ-GUESS, LPJ-DH, topographic index
Original languageEnglish
Title of host publicationClimate and Land Surface Changes in Hydrology
PublisherInternational Association of Hydrological Sciences
Pages320-326
Volume359
Publication statusPublished - 2013
Publication categoryResearch
Peer-reviewedYes
EventInternational Association of Hydrological Sciences Symposium on Climate and Land Surface Changes in Hydrology / IAHS-IAPSO-IASPEI Joint Assemply - Gothenburg, Sweden
Duration: 2013 Jul 222013 Jul 26

Publication series

Name
Volume359
ISSN (Print)0144-7815

Conference

ConferenceInternational Association of Hydrological Sciences Symposium on Climate and Land Surface Changes in Hydrology / IAHS-IAPSO-IASPEI Joint Assemply
CountrySweden
CityGothenburg
Period2013/07/222013/07/26