A5068577591- Cryospheric studies and observations
- Hydrology and Watershed Management Studies
- Soil and Water Nutrient Dynamics
- Geology and Paleoclimatology Research
- Polar Research and Ecology
- Arctic and Antarctic ice dynamics
- Sustainability and Climate Change Governance
- Climate change and permafrost
- Water resources management and optimization
- Groundwater and Isotope Geochemistry
- Child Nutrition and Water Access
- Policy Transfer and Learning
- Landslides and related hazards
- Soil erosion and sediment transport
- Methane Hydrates and Related Phenomena
- Water Quality Monitoring and Analysis
- Flood Risk Assessment and Management
- Water Quality and Pollution Assessment
- Hydrology and Drought Analysis
- Diverse Aspects of Tourism Research
- Atmospheric and Environmental Gas Dynamics
- Winter Sports Injuries and Performance
- Fish Ecology and Management Studies
- Wind and Air Flow Studies
- Climate variability and models
University of Otago
2013-2025
Human activities both aggravate and alleviate streamflow drought. Here we show that aggravation is dominant in contrasting cases around the world analysed with a consistent methodology. Our 28 included different combinations of human-water interactions. We found water abstraction aggravated all drought characteristics, increases 20%–305% total time across case studies, deficit up to almost 3000%. Water transfers reduced by 97%. In into catchment or augmenting from groundwater, inputs could...
Ongoing glacier retreat is causing the loss of a critical water resource in mountain regions, with wide-ranging downstream impacts. These include shifts streamflow seasonality, change availability, and changes to low-flow conditions, either exacerbating or alleviating them. To date, most hydrological impact studies have relied on model simulations for specific regions catchments, often driven by future climate scenarios. However, evidence based direct observational data scarce due limited...
Optical nitrate-nitrogen (NO3-N) sensors are used in environmental monitoring for the real-time detection of dissolved inorganic nitrate and readily available increasingly affordable use by non-experts may eventually replace need expensive laboratory analysis. Many different manufacturers have developed their own instruments as permanent situ groundwater bores, or portable ex units. The advantage these NO3-N is that they can be deployed to complement traditional discrete sampling programmes...
Abstract Human-induced warming is modifying the water cycle. Adaptation to posed threats requires an understanding of hydrological responses climate variability. Whilst these can be computationally modelled, observed streamflow data essential for constraining models, and quantifying emerging trends in To date, identification such at global scale has been hindered by limitations – particular, prevalence direct human influences on which obscure climate-driven By removing influences, more...
ABSTRACT In this study, suspended sediment from seven alpine rivers was collected for analysis of their textural and geochemical properties to determine what effect differences in geochemistry, particle shape, organic matter have on turbidity ratings. Small variations the shape were shown a greater rating than mineralogy. The geochemistry SPM consistently elevated Al 2 O 3 , CaO, K O, FeO, MnO, TiO relative riverine bed sand, because higher density minerals are likely be preferentially...
Informal community‐based supply, characterised by abstractions from surface water and shallow wells, is the main supply source in urban areas of developing nations. Formal sector has failed to extend their services many yet formal continues view these practices as small‐scale, traditional ‘backward’, ones that must be eradicated areas. While idealise notion ‘modern infrastructure ideal’, based solely upon expansion piping networks, this paper argues against ideal, instead presenting an...
Abstract Nephelometric turbidity is an optical index for the side scattering of light caused by fine particles suspended in water. When a mixed composition inorganic and organic materials, including dissolved material, present, measurements can be affected different properties materials turbidimeters are more or less sensitive to these influences. Two methods nephelometric measurement were assessed (using instruments confirming two standard methods: EPA 180.1 ISO 7027). We investigated...
One feature of high-latitude areas is the formation ice clusters attached to beds rivers, lakes and sea. This anchor ice, as it widely known, plays an important role in mobilizing bed sediments, well ecological roles a food source, habitat potentially fatal environment. Much work has been devoted fluvial Northern Hemisphere, yet comparatively little described polar marine environments, despite its description by Antarctic expedition scientists over century ago. In this paper, we review...
Previous studies of polar glaciers have argued that basal ice can form when these override and entrain marginal aprons accumulate adjacent to steep cliffs. To test this idea, we studied the morphology, structure, composition, deformation apron at terminus Victoria Upper Glacier in McMurdo dry valleys, which are located on western coast Ross Sea 77°S southern Land, Antarctica. Our results show has two structural elements: an inner element consists strongly foliated a up‐glacier dip, outer...
Stakeholder collaboration has become a critical issue in sustainable tourism policy due to the increasing complexity and interdisciplinary nature of domain. Policymaking should reflect values through dynamic system which stakeholders come consensus on sustainability issues via ongoing interactive engagement. Taking Singapore’s hotel sector as case, this study explores how stakeholder relationships contribute participatory policymaking water management. Based survey 33 relevant organisations,...
Abstract A combination of ground-penetrating radar surveys, physical sedimentology and ice composition measurements has been used to characterize sediment accreted the southern margin McMurdo Ice Shelf, Antarctica. The data surface observations show that ice-shelf consists strongly layered debris-rich contains marine fossils. modified Rayleigh-based distillation system model isotopic fractionation from sea water in a closed system. formation is consistent with during almost complete freezing...
Water use in the tourism industry is a vital sustainability issue destination development. Achieving sustainable water demand management (WDM) challenging and requires stakeholder collaboration for effective participatory policymaking. Taking WDM of Singapore's hotel sector as case, this article applies policy network analysis to prevailing based on public documents published between 2001 2015. Thirty-three interconnected organisational stakeholders 76 domains were identified. Longitudinal...
We investigated students' perceptions of graduate attributes in a multi-level (second and third year) geography course. A case study with mixed methodology was employed, data collected through focus groups survey. found that undergraduate students can identify the skills, knowledge are developed course programme, these broadly align stated discipline. Moreover, there evidence progressive development between second year students. The results suggest peer-to-peer learning play an important...
Abstract Turbidity, an index of light side‐scattering, depends on the mass concentration suspended sediment (SS) within water. Turbidity river water is regulated by presence particulate matter and used to identify visual changes in response SS. We data from New Zealand National River Water Quality Network, calculate “specific turbidity” ( K ; turbidity normalised particulates). Specific shown here be effective metric assess effect material composition particle size distribution over...
Abstract. The leaching of inorganic nitrogen can adversely affect groundwater and hydrologically connected streams rivers. Traditionally, these effects have been assessed using discrete water quality measurements. However, it is difficult to characterise the complex biogeochemical processes that control nitrate-nitrogen dynamics in temporally sparse data. In this study, we installed a continuous UV nitrate sensor, downgradient forestry land use shallow, gravel aquifer understand groundwater....
Abstract Atmospheric moisture transport is crucial for understanding New Zealand’s climate dynamics, particularly with respect to extreme precipitation events. While the majority of previous studies have focussed on Rivers (ARs), this study examines entire spectrum water vapour and its link using 40 years (1981–2020) Integrated Water Vapour Transport (IVT) data over region. Although ARs are important drivers precipitation, they infrequent as account less than 10% total at most coastal...
Abstract Local water providers in developing nations typically view shallow hand-dug wells as traditional and backward sources of supply. It has long been assumed that the urban poor do not have ability to develop these a way allows them be classified ‘improved’ terms Millennium Development Goal for water, believing users understand factors constitute safe threats sources. Our assessment level environmental knowledge held by local water-users Ndola Zambia demonstrates coherent understanding...