An Integrated Approach For The Assessment
Of Water Availability For Irrigation In
Semi-arid Regions
Author(s)
A. Kassem & A. Pietroniro
Abstract
An integrated approach to water availability assessment for irrigation is
presented and illustrated through examples from Canada’s South Saskatchewan
River Basin (SSRB). It is based on the integration of irrigation and non-irrigation
water demands at the basin level, and accounts for the seasonal and annual
variation in water supply and water demand. Irrigation water demands are
derived from a detailed simulation model which estimates irrigation water
diversion and return flow based on physical, climatic and operational parameters
and management practices. By integrating the time varying demand and supply,
water availability can be expressed in terms of probability or a risk-management
context. The impact of any long-term climatic changes on water availability is
determined through integration of the resulting changes in water demand and
water supply. The paper explains the modelling framework used and its
application to SSRB, with special emphasis on irrigation. The importance of
accounting for the temporal variability of demand and supply when assessing
water availability is demonstrated through several examples, including
sensitivity analysis of the irrigation sector and the overall basin water resources
to climatic changes.
The views expressed in this paper are those of the authors and do not
necessarily represent the views of their employer.
Keywords: irrigation water demand, water availability, IWRM, climate
variability, climate change, P, ETP, risk, GCM, WATFLOOD.
Keywords
irrigation water demand, water availability, IWRM, climate
variability, climate change, P, ETP, risk, GCM, WATFLOOD.
Related Book
Other papers in this volume
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