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An integrated dynamic modeling framework for investigating the impact of climate change and variability on irrigated agriculture
Author(s) -
Rowan Timothy S. C.,
Maier Holger R.,
Connor Jeff,
Dandy Graeme C.
Publication year - 2011
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/2010wr010195
Subject(s) - climate change , environmental science , agriculture , irrigation , profitability index , water resources , water resource management , agricultural productivity , environmental resource management , geography , business , ecology , archaeology , finance , biology
Many hydrologic systems are likely to be affected by climate change. This is of particular importance given that agricultural production systems are inextricably linked to the hydrologic systems they rely upon. Although irrigation is often employed as a method to dampen the effect of short‐term variation in climatic inputs to agricultural production, sources of irrigation water are not immune to long‐term climatic change. Irrigation water use decisions are most often made at the farm level. It is at this scale that the economic and social impacts of climate change will be manifest. This paper presents an integrated stochastic dynamic modeling framework that can be used to investigate the viability of irrigated farms under alternative climate change scenarios. The framework is applied to a theoretical farm in the Murray Darling Basin, Australia, under four potential future climate scenarios. It is found that neglecting interannual variability in climatic inputs to agriculture consistently underestimates the reduction in farm viability caused by climate change and that multiyear sequences of climate states strongly influence estimates of farm profitability.