Rivers and Lakes Under a Changing Climate

2019 H3S Spring Cyberseminar Series

Lauren Somers / McGill University
Claire Beveridge / University of Washington
Fatemeh Ghader / Technische Universität Berlin
Katherine Markovich / University of Arizona

Talk Descriptions

Climate impacts on Andean hydrology using a mountain systems approach (Somers)

As Andean glaciers recede, the capacity of snow and ice to buffer low flow periods is lost. We integrate climate, glacier, surface water and groundwater modelling techniques to project hydrologic change in an Andean catchment through 2100.

From the Elwha to the Mekong: Watershed-scale sediment dynamics under the impacts of hydropower dams and environmental change (Beveridge)

This talk will provide an overview of how interdisciplinary research approaches, encompassing computational modeling and satellite remote sensing, are being applied to understanding river network sediment transport and storage. These approaches are applied in two study areas of vastly different environmental conditions and stages of hydropower dam development: the Elwha River Basin of Washington State, where the world's largest dam removal recently occurred; and the Mekong River Basin of Southeast Asia, where hydropower development is rapidly advancing.

Water and water shortage in Iran, Case study Tashk-Bakhtegan and Maharlu lakes basin, Iran (Ghader)

In this study for the first time, complete research was carried out to understand the hydrologic circle of Tashk-Bakhtegan and Maharlu lakes' basin. In this study, those basins were evaluated in terms of meteorology, surface water, groundwater, water quality, and water balance was carried out. Although the agriculture section was evaluated as the most water consumer.

Climate change and mountain groundwater: an integrated field and numerical approach (Markovich)

Climate change will exacerbate water scarcity globally and particularly in snowmelt-dominated regions via a snow-to-rain shift and earlier snowmelt period. Observational records of mountain systems show evidence of this snow-to-rain transition; however, the mountain groundwater response is not well understood. This uncertainty is largely due to our inability to ‘see’ mountain groundwater, because mountain systems are generally data poor and deep wells completed in the mountain block are rarely available. My research blends field and numerical methods to characterize mountain groundwater systems with the ultimate goal of improved prediction of hydrologic response to climate change in mountain systems. First, I present a Bayesian hydrograph separation approach to better constrain the proportional contribution of groundwater to streamflow in a volcanic catchment in Central Chile. This approach is useful in data limited systems for developing a conceptual model of the surface water groundwater interactions, and for further hypothesis development of climate change response; however, this lacks a direct, quantitative link to integrated hydrologic models. My current research explores the use of multiple age tracers ( 3 H/ 3 He, 39 Ar, 14 C) in mountain groundwater systems as a direct link to an integrated hydrologic model, ParFlow-CLM, via particle tracking. This work aims to constrain estimates of mountain block recharge to the Tucson basin and project recharge response under future climate conditions.

Note: The recording will be published at a later date due to unpublished work.

2019 H3S Spring Cyberseminar Series: Early career scientists conquer new frontiers: an H3S conversation

Hosted by CUAHSI and AGU's H3S

For the month of April, H3S, AGU's Hydrology Section Student Subcommittee, will be taking over CUAHSI's Cyberseminar series. Each of the four seminars will showcase talks by four early career scientists studying some of the most pressing issues around hydrology and beyond, including 1) Coastal Dynamics in a Changing World, 2) Rivers and Lakes Under a Changing Climate, 3) Water Resources and Management, and 4) Water Pollution and Quality. Scientists will give short presentations on the week's theme followed by a brief Q&A.