TY - JOUR
T1 - Development of an integrated model for the Campaspe catchment: A tool to help improve understanding of the interaction between society, policy, farming decision, ecology, hydrology and climate
AU - Iwanaga, Takuya
AU - Zare, Fateme
AU - Croke, Barry F.W.
AU - Fu, Baihua
AU - Merritt, Wendy S.
AU - Partington, Daniel Joseph
AU - Ticehurst, Jenifer L.
AU - Jakeman, Anthony J.
PY - 2018/6/5
Y1 - 2018/6/5
N2 - Management of water resources requires understanding of the hydrology and hydrogeology, as well as the policy and human drivers and their impacts. This understanding requires relevant inputs from a wide range of disciplines, which will vary depending on the specific case study. One approach to gain understanding of the impact of climate and society on water resources is through the use of an integrated modelling process that engages stakeholders and experts in specifics of problem framing, co-design of the underpinning conceptual model, and discussion of the ensuing results. In this study, we have developed such an integrated modelling process for the Campaspe basin in northern Victoria, Australia. The numerical model built has a number of components: - Node/link based surface water hydrology module based on the IHACRES rainfall-streamflow model-Distributed groundwater model for the lower catchment (MODFLOW) - Farm decision optimisation module (to determine irrigation requirements)-Policy module (setting conditions on availability of water based on existing rules)-Ecology module (determining the impacts of available streamflow on platypus, fish and river red gum trees)-The integrated model is component based and has been developed in Python, with the MODFLOW and surface water hydrology model run in external programs, controlled by the master program (in Python). The integrated model has been calibrated using historical data, with the intention of exploring the impact of various scenarios (future climate scenarios, different policy options, water management options) on the water resources. The scenarios were selected based on workshops with, and a social survey of, stakeholders in the basin regarding what would be socially acceptable and physically plausible options for changes in management. An example of such a change is the introduction of a managed aquifer recharge system to capture dam overflows, and store at least a portion of this in the aquifer, thereby increasing the groundwater resource as well as reducing the impact of existing pumping levels.
AB - Management of water resources requires understanding of the hydrology and hydrogeology, as well as the policy and human drivers and their impacts. This understanding requires relevant inputs from a wide range of disciplines, which will vary depending on the specific case study. One approach to gain understanding of the impact of climate and society on water resources is through the use of an integrated modelling process that engages stakeholders and experts in specifics of problem framing, co-design of the underpinning conceptual model, and discussion of the ensuing results. In this study, we have developed such an integrated modelling process for the Campaspe basin in northern Victoria, Australia. The numerical model built has a number of components: - Node/link based surface water hydrology module based on the IHACRES rainfall-streamflow model-Distributed groundwater model for the lower catchment (MODFLOW) - Farm decision optimisation module (to determine irrigation requirements)-Policy module (setting conditions on availability of water based on existing rules)-Ecology module (determining the impacts of available streamflow on platypus, fish and river red gum trees)-The integrated model is component based and has been developed in Python, with the MODFLOW and surface water hydrology model run in external programs, controlled by the master program (in Python). The integrated model has been calibrated using historical data, with the intention of exploring the impact of various scenarios (future climate scenarios, different policy options, water management options) on the water resources. The scenarios were selected based on workshops with, and a social survey of, stakeholders in the basin regarding what would be socially acceptable and physically plausible options for changes in management. An example of such a change is the introduction of a managed aquifer recharge system to capture dam overflows, and store at least a portion of this in the aquifer, thereby increasing the groundwater resource as well as reducing the impact of existing pumping levels.
KW - hydrology
KW - hydrogeology
KW - societal impact
KW - climate impact
KW - water resources
KW - Integrated modelling
KW - MODFLOW
KW - surface water
KW - groundwater
UR - http://www.scopus.com/inward/record.url?scp=85048858457&partnerID=8YFLogxK
U2 - 10.5194/piahs-379-1-2018
DO - 10.5194/piahs-379-1-2018
M3 - Conference article
SN - 0144-7815
VL - 379
SP - 1
EP - 12
JO - IAHS-AISH Publication
JF - IAHS-AISH Publication
T2 - 8th International Symposium on Integrated Water Resources Management, IWRM 2018
Y2 - 13 June 2018
ER -