Michael J. Stewardson

ORCID: 0000-0003-1356-0472
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About
Contact & Profiles
Research Areas
  • Hydrology and Watershed Management Studies
  • Hydrology and Sediment Transport Processes
  • Fish Ecology and Management Studies
  • Water resources management and optimization
  • Flood Risk Assessment and Management
  • Soil erosion and sediment transport
  • Soil and Water Nutrient Dynamics
  • Water-Energy-Food Nexus Studies
  • Hydrological Forecasting Using AI
  • Aquatic Invertebrate Ecology and Behavior
  • Urban Stormwater Management Solutions
  • Freshwater macroinvertebrate diversity and ecology
  • Hydraulic flow and structures
  • Water Systems and Optimization
  • Water Quality and Pollution Assessment
  • Groundwater flow and contamination studies
  • Environmental and Social Impact Assessments
  • Hydrology and Drought Analysis
  • Wastewater Treatment and Nitrogen Removal
  • Simulation Techniques and Applications
  • Economic and Environmental Valuation
  • Media Influence and Politics
  • Water Governance and Infrastructure
  • Transboundary Water Resource Management
  • Time Series Analysis and Forecasting

The University of Melbourne
2015-2024

University of Waikato
2013-2014

University of Canberra
2001-2007

Norsk Hydro (Germany)
2002

Norsk Hydro (Norway)
2002

In regulated rivers, the relationship between wetted perimeter and discharge is sometimes used as an expedient technique for determining minimum flow allowable environmental purposes. The critical supposed to correspond point where there a break in shape of curve (usually logarithmic or power function). Below this discharge, declines rapidly. This on almost universally, but incorrectly, termed 'inflection' point, usually determined subjectively by eye from graph. appearance strongly...

10.1002/(sici)1099-1646(199801/02)14:1<53::aid-rrr476>3.0.co;2-z article EN Regulated Rivers Research & Management 1998-01-01

The terrestrial phase of the water cycle can be seriously impacted by management and human use behavior (e.g., reservoir operation, irrigation withdrawals). Here we outline a method for assessing availability in changing climate, while explicitly considering anthropogenic demand scenarios supply infrastructure designed to cope with climatic extremes. framework brings top-down bottom-up approach provide localized assessment based on local projected demands. When our is applied southeastern...

10.1038/s41598-017-06765-0 article EN cc-by Scientific Reports 2017-07-18

AbstractThe importance of social media for election campaigning has received a lot attention recently. Using data from the 2011 New Zealand general and size candidates' networks on Facebook Twitter, we investigate whether is associated with votes probability success. Overall, our results suggest that there statistically significant relationship between online voting results. However, effect small it appears presence therefore only predictive in closely contested elections.KEYWORDS:...

10.1080/15377857.2014.959690 article EN Journal of Political Marketing 2014-10-14

10.1016/j.jhydrol.2004.09.004 article EN Journal of Hydrology 2004-12-15

Sound decision making in environmental research and management requires an understanding of causal relationships between stressors ecological responses. However, demonstrating cause–effect natural systems is challenging because difficulties with variability, performing experiments, lack replication, the presence confounding influences. Thus, even best-designed study may not establish causality. We describe a method that uses evidence available extensive published literature to assess support...

10.1899/11-027.1 article EN Freshwater Science 2012-01-24

ADVERTISEMENT RETURN TO ISSUEPREVFeatureNEXTAdapting Urban Water Systems to a Changing Climate: Lessons from the Millennium Drought in Southeast AustraliaStanley B. Grant*†‡, Tim D. Fletcher⊥, David Feldman§, Jean-Daniel Saphores†§, Perran L. M. Cook#, Mike Stewardson‡, Kathleen Low†, Kristal Burry∇, and Andrew J. Hamilton∥View Author Information† Department of Civil Environmental Engineering, E4130 Engineering Gateway, University California, Irvine, California 92697-2175, United States‡...

10.1021/es400618z article EN Environmental Science & Technology 2013-05-03

Summary Human‐induced changes in river flow regimes are ubiquitous worldwide. Although numerous case studies have identified negative ecological impacts of different aspects (e.g. magnitude, timing), there been few attempts to systematically review this literature derive general relationships regarding responses regimes. Systematic reviews can inform science and management ecologically complex systems not amenable experimentation. However, such analysis existing is often limited by...

10.1111/fwb.12234 article EN cc-by-nc-nd Freshwater Biology 2013-08-26

Summary 1. Inferring effects of environmental flows is difficult with standard statistical approaches because flow‐delivery programs are characterised by weak experimental design, and monitoring often have insufficient replication to detect ecologically significant effects. Bayesian hierarchical may be more suited the task, as they flexible allow data from multiple non‐replicate sampling units (e.g. rivers) combined, increasing inferential strength. 2. We assessed utility models for...

10.1111/j.1365-2427.2009.02205.x article EN Freshwater Biology 2009-03-31

A key challenge in managing semiarid basins, such as the Murray‐Darling Australia, is to balance trade‐offs between net benefits of allocating water for irrigated agriculture, and other uses, versus costs reduced surface flows environment. Typically, planners do not have tools optimally dynamically allocate among competing uses. We address this problem by developing a general stochastic, dynamic programming model with four state variables (the drought status, current weather, weather...

10.1029/2010wr009786 article EN Water Resources Research 2011-06-29

Significant progress in environmental flow management has occurred recent years due to several factors. These include governments committing programs, significant scientific understanding, and assessment methods that are cognizant of stakeholder participation co-design. However, there remain key challenges facing water management. In this paper, we report on a horizon scanning exercise identified the questions, which, if answered, would deliver much needed field We distributed an online...

10.3389/fenvs.2017.00089 article EN cc-by Frontiers in Environmental Science 2017-12-14

The forecast of warmer weather, and reduced precipitation streamflow under climate change makes freshwater biota particularly vulnerable to being exposed temperature extremes. Given the importance regulate vital physiological processes, availability discrete cold-water patches (CWPs) in rivers act as potential thermal refugia is critical support ecosystem function. Being able predict their spatial distribution at riverscape scales first step understanding capacity maintain refuges inform...

10.3389/fenvs.2020.00064 article EN cc-by Frontiers in Environmental Science 2020-05-27

Abstract Linking environmental flow dam release rules to variables has potential link the variability of a regulated stream forces acting on catchment. A technique is developed examine range related gauged tributary inflows and optimize these with respect total water volumes other criteria. model created consisting three parts: (1) Dam Release Event Generator, which generates releases according set rules, (2) simple routing using linear transforms derived time‐series for ungauged inflows,...

10.1002/rra.836 article EN River Research and Applications 2005-02-01
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