All Outputs (96)

A novel stochastic method for reconstructing daily precipitation times-series using tree-ring data from the western Canadian Boreal Forest (2017)
Journal Article

Tree ring data provide proxy records of historical hydroclimatic conditions that are widely used for reconstructing precipitation time series. Most previous applications are limited to annual time scales, though information about daily precipitation... Read More about A novel stochastic method for reconstructing daily precipitation times-series using tree-ring data from the western Canadian Boreal Forest.

Trend analysis of nutrient loadings in a large prairie catchment (2016)
Journal Article

Nutrient loadings in many river catchments continue to increase due to rapid expansion of agriculture, urban and industrial development, and population growth. Nutrient enrichment of water bodies has intensified eutrophication which degrades water qu... Read More about Trend analysis of nutrient loadings in a large prairie catchment.

Parameter sensitivity of a surface water quality model of the lower South Saskatchewan River—Comparison between ice-on and ice-off periods (2016)
Journal Article

Little is known about seasonal differences (ice-on vs. ice-off periods) and the sensitivity of in-stream processes to surface water quality constituents in rivers that have a persistent ice cover in winter. The goal of this study is to investigate th... Read More about Parameter sensitivity of a surface water quality model of the lower South Saskatchewan River—Comparison between ice-on and ice-off periods.

Assessing the relative importance of parameter and forcing uncertainty and their interactions in conceptual hydrological model simulations (2016)
Journal Article

Predictions of river flow dynamics provide vital information for many aspects of water management including water resource planning, climate adaptation, and flood and drought assessments. Many of the subjective choices that modellers make including m... Read More about Assessing the relative importance of parameter and forcing uncertainty and their interactions in conceptual hydrological model simulations.

Forms and drivers of annual streamflow variability in the headwaters of Canadian Prairies during the 20th century (2016)
Journal Article

Headwater streamflows in the Rocky Mountain foothills are the key to water availability in the Canadian Prairies. Headwater characteristics, however, have been and continue to be subject to major variability and change. Here, we identify various form... Read More about Forms and drivers of annual streamflow variability in the headwaters of Canadian Prairies during the 20th century.

The effect of fallow period length on the abundance and diversity of usable plant assemblages in shifting cultivation system (Swidden agriculture) in northern Laos (2016)
Journal Article

Shifting cultivation, or swiddening, involves alternating cycles of cropping and fallow periods. Rather than being abandoned, the fallow swidden fields provide a source of important plant products for remote, forest-dwelling human communities. In nor... Read More about The effect of fallow period length on the abundance and diversity of usable plant assemblages in shifting cultivation system (Swidden agriculture) in northern Laos.

Recent climatic, cryospheric, and hydrological changes over the interior of western Canada: A review and synthesis (2016)
Journal Article

It is well established that the Earth's climate system has warmed significantly over the past several decades, and in association there have been widespread changes in various other Earth system components. This has been especially prevalent in the c... Read More about Recent climatic, cryospheric, and hydrological changes over the interior of western Canada: A review and synthesis.

Quantifying spatial changes in the structure of water quality constituents in a large prairie river within two frameworks of a water quality model (2016)
Journal Article

A global sensitivity analysis was carried out on a water quality model to quantify the spatial changes in parameter sensitivity of a model of a large prairie river, the South Saskatchewan River (SSR). The method is used to assess the relative impacts... Read More about Quantifying spatial changes in the structure of water quality constituents in a large prairie river within two frameworks of a water quality model.

What is the most efficient and effective method for long-term monitoring of alpine tundra vegetation? (2016)
Journal Article

Nondestructive estimations of plant community characteristics are essential to vegetation monitoring programs. However, there is no universally accepted method for this purpose in the Arctic, partly because not all programs share the same logistical... Read More about What is the most efficient and effective method for long-term monitoring of alpine tundra vegetation?.

Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions (2016)
Journal Article

Water transpired by trees has long been assumed to be sourced from the same subsurface water stocks that contribute to groundwater recharge and streamflow. However, recent investigations using dual water stable isotopes have shown an apparent ecohydr... Read More about Insights into plant water uptake from xylem-water isotope measurements in two tropical catchments with contrasting moisture conditions.

Dynamic water quality modelling and uncertainty analysis of phytoplankton and nutrient cycles for the upper South Saskatchewan River (2015)
Journal Article

The surface water quality of the upper South Saskatchewan River was modelled using Water Quality Analysis Simulation Program (WASP) 7.52. Model calibration and validation were based on samples taken from four long-term water quality stations during t... Read More about Dynamic water quality modelling and uncertainty analysis of phytoplankton and nutrient cycles for the upper South Saskatchewan River.

Who smells? Forecasting taste and odor in a drinking water reservoir (2015)
Journal Article

Taste and odor problems can impede public trust in drinking water and impose major costs on water utilities. The ability to forecast taste and odor events in source waters, in advance, is shown for the first time in this paper. This could allow water... Read More about Who smells? Forecasting taste and odor in a drinking water reservoir.

Tree rings provide early warning signals of jack pine mortality across a moisture gradient in the southern boreal forest (2015)
Journal Article

Recent declines in productivity and tree survival have been widely observed in boreal forests. We used early warning signals (EWS) in tree ring data to anticipate premature mortality in jack pine (Pinus banksiana) - an extensive and dominant species... Read More about Tree rings provide early warning signals of jack pine mortality across a moisture gradient in the southern boreal forest.

An efficient calibration technique for heat dissipation matric water potential sensors (2015)
Journal Article

Heat dissipation sensors are used to measure matric potential in soils. A van Genuchten equation can be used to fit the relationship between measured heat dissipation and matric potential. Calibration is required for each probe because of intrinsic v... Read More about An efficient calibration technique for heat dissipation matric water potential sensors.

Unpacking viewpoints on water security: Lessons from the South Saskatchewan River Basin (2015)
Journal Article

Water is essential for human development and the environment; however, its security is challenged by factors such as competing uses, over extraction, and divergent perspectives. The focus of this paper is to better understand how different stakeholde... Read More about Unpacking viewpoints on water security: Lessons from the South Saskatchewan River Basin.

Temporal dynamics of catchment transit times from stable isotope data (2015)
Journal Article

Time variant catchment transit time distributions are fundamental descriptors of catchment function but yet not fully understood, characterized, and modeled. Here we present a new approach for use with standard runoff and tracer data sets that is bas... Read More about Temporal dynamics of catchment transit times from stable isotope data.

Beaver-mediated methane emission: The effects of population growth in Eurasia and the Americas (2015)
Journal Article

Globally, greenhouse gas budgets are dominated by natural sources, and aquatic ecosystems are a prominent source of methane (CH4) to the atmosphere. Beaver (Castor canadensis and Castor fiber) populations have experienced human-driven change, and CH4... Read More about Beaver-mediated methane emission: The effects of population growth in Eurasia and the Americas.

Divergent Perspectives on Water Security: Bridging the Policy Debate (2015)
Journal Article

Environmental policy discussion is replete with references to water security, food security, ecosystem health, community resilience, sustainable development, and sustainable urbanism. These terms are, by their very nature, ambiguous and difficult to... Read More about Divergent Perspectives on Water Security: Bridging the Policy Debate.

North American precipitation isotope (δ18O) zones revealed in time series modeling across Canada and northern United States (2015)
Journal Article

Delineating spatial patterns of precipitation isotopes ("isoscapes") is becoming increasingly important to understand the processes governing the modern water isotope cycle and their application to migration forensics, climate proxy interpretation, a... Read More about North American precipitation isotope (δ18O) zones revealed in time series modeling across Canada and northern United States.

Temporal trends in δ18O composition of precipitation in Germany: Insights from time series modelling and trend analysis (2014)
Journal Article

Temporal and spatial variations of stable oxygen (18O) and hydrogen (2H) isotope measurements in precipitation act as important proxies for changing hydro-meteorological and regional and global climate patterns. Temporal trends in time series of the... Read More about Temporal trends in δ18O composition of precipitation in Germany: Insights from time series modelling and trend analysis.