Isotope-enabled Models for Improved Estimates of Water Balance in Catchments

Closed for proposals

Project Type

Coordinated Research Project

Project Code

F31005

CRP

2207

Approved Date

7 December 2017

Status

3 - Active - Ongoing

Start Date

28 May 2018

Expected End Date

30 June 2023

Participating Countries

Argentina
Australia
Canada
Chad
Costa Rica
Czech Republic
Ecuador
Ethiopia
France
Germany
Japan
Luxembourg
Viet Nam

Description

The use of stable isotope tools to identify the main flow paths and residence times of both surface and ground waters has been expanded to improve the simulated components of the water balance model at several scales: from small catchment areas to larger hydrological basins. The IAEA’s Isotope Hydrology Section has developed, in cooperation with various partners, the IAEA Water Balance Model with Isotopes (IWBMIso), which aims to promote and expand the use of common isotope tracers to obtain more precise estimates of the various water balance components and water fluxes in a range of climatic and hydrological settings. Once the model has been fully tested in different selected catchments and scenarios, which is the main objective of this CRP, it can be routinely incorporated into future technical cooperation projects dealing with isotope hydrology and water resources management.

Objectives

To improve capability and expertise among Member States in the use of environmental isotopes to better assess impacts of climate change on water resources availability and sustainability.

Specific objectives

Initiate/consolidate monthly or higher-frequency monitoring of stable isotopes in precipitation, rivers, shallow groundwater and wetlands using available laser isotope analysers in Member States.

Setup and apply isotope-enabled water balance model by using present-day precipitation isotope data in selected catchments.

Develop/improve scenario analysis of impacts of climate change on water resources availability and sustainability using calibrated and validated isotope-enabled water balance models

Improve local/regional expertise in the development and application of isotope-enabled water balance models for better water resources management

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