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Publications (34)
Water is essential to human life and to the ecosystem that it relies upon. Overexploitation of water resources accompanying global population growth and impacts of climate change yield water scarcity increasing the demand for clean water. In the era of frequent abnormal weather patterns becoming a new norm at global scales, it is important to ensur...
Total suspended solids (TSS) concentration is an important biogeochemical parameter for water quality management and sediment-transport studies. In this study, we propose a novel semi-analytical method for estimating TSS in clear to extremely turbid waters from remote-sensing reflectance (Rrs). The proposed method includes three sub-algorithms used...
One of the challenging tasks in modern aquatic remote sensing is the retrieval of near-surface concentrations of Total Suspended Solids (TSS). This study aims to present a Statistical, inherent Optical property (IOP) -based, and muLti-conditional Inversion proceDure (SOLID) for enhanced retrievals of satellite-derived TSS under a wide range of in-w...
Consistent, cross-mission retrievals of near-surface concentration of chlorophyll-a (Chla) in various aquatic ecosystems with broad ranges of trophic levels have long been a complex undertaking. Here, we introduce a machine-learning model, the Mixture Density Network (MDN), that largely outperforms existing algorithms when applied across different...
Water quality monitoring is an integral tool in the management of freshwater resources. It identifies trends in water quality and tracks the effects of anthropogenic influences such as shoreline development and eutrophication and the successes of restoration actions. Remote sensing presents a cost efficient complementary approach for a more compreh...
An approach that combines field observations and satellite inferences of Secchi depth could transform how we assess water clarity across the globe and pinpoint key changes over the past century.
Remote sensing provides water quality data with a high spatial and temporal resolution for thousands of lakes at a time. It supports the evaluation of environmental problems and potential health risks through the analysis of changes in water quality and the detection of harmful algal blooms. Several remote sensing programs provide historical data f...
The development of capabilities for the remote sensing of water quality in Wisconsin started in 1999 when Citizen Lake Monitoring Network (CLMN) volunteers assisted in a collaborative research effort with the University of Wisconsin-Madison Environmental Remote Sensing Center (ERSC) to develop a model for the retrieval of water clarity data from sa...
The Operational Land Imager (OLI) onboard Landsat-8 is generating high-quality aquatic science products, the most critical of which is the remote sensing reflectance (Rrs), defined as the ratio of water-leaving radiance to the total downwelling irradiance just above water. The quality of the Rrs products has not, however, been extensively assessed....
Understanding how and why lakes vary and respond to different drivers through time and space is needed to understand, predict, and manage freshwater quality in an era of rapidly changing land use and climate. Water clarity regulates many characteristics of aquatic ecosystems and is responsive to watershed features, making it a sentinel of environme...
Group on Earth Observations Water Quality Summit; Geneva, Switzerland, 20–22 April 2015
Water quality monitoring is an integral part of water resource management. Monitoring will insure sustainable use of our aquatic resources and track short and long-term changes resulting from anthropogenic influences such as shoreline development, eutrophication, and climate change. Current water quality monitoring budgets can constrain the assessm...
Biogeochemical cycles, contaminant transport through the fluvial system and therefore water quality are strongly coupled to sediment fluxes. Coping with pressing global challenges and moving towards sustainable development therefore requires the availability of global sediment data, which is an important source of information for scientists, enviro...
Optical properties have fundamental importance to water quality, ecology, and remote sensing initiatives. Paired measurements of optically active constituents (OACs), and inherent optical properties (IOPs) and apparent optical properties (AOPs), were made in September 2010 across the optical gradients of Green Bay, extending from the Fox River to S...
It has been a long-standing goal to precisely measure water-leaving radiance ( L w , or its equivalent property, remote-sensing reflectance) in the field, but reaching this goal is quite a challenge. This is because conventional approaches do not provide a direct measurement of L w , but rather measure various related components and subsequently de...
375 Coastal and inland water bodies, which have great value for recreation, food sup-ply, commerce, transportation, and human health, have been experiencing external pres-sure from direct human activities and climate change. Given their societal and economic value, understanding issues of water qual-ity, water quantity, and the impact of environ-me...
Workshop for Remote Sensing of Coastal and Inland Waters;Madison,
Wisconsin, 20-22 June 2012 Coastal and inland water bodies, which
have great value for recreation, food supply, commerce, transportation,
and human health, have been experiencing external pressure from direct
human activities and climate change. Given their societal and economic
valu...
Global climate change is expected to alter temperature and flow regimes for streams in Wisconsin over the coming decades. Stream temperature will be influenced not only by the predicted increases in average air temperature, but also by changes in baseflow due to changes in precipitation patterns and amounts. In order to evaluate future stream tempe...
The State of Wisconsin has over 15,000 lakes. They are important in supporting the state's recreation economy as well as a diverse aquatic ecological community. Increased costs for lake monitoring along with staff shortages have forced the state to seek alternative methods to monitor these numerous water bodies. The state has successfully developed...
Historically, dissolved-oxygen (DO) data have been collected in the same manner as other water-quality constituents, typically at infrequent intervals as a grab sample or an instantaneous meter reading. Recent years have seen an increase in continuous water-quality monitoring with electronic dataloggers. This new technique requires new approaches i...
This study evaluated the water-quality benefits of a new urban best management practice design called the multichambered treatment train (MCTT). The study consisted of collecting flow-weighted water-quality samples at influent and effluent locations for 15 consecutive storms. Device efficiencies were based on load reductions of 68 constituents. Tot...
A 5 670-m2 wet detention pond draining a predominantly residential urban area was monitored for flow, suspended solids, bedload, particle-size distribution, and selected pollutants during 16 storm events. Both suspended solids concentrations and particle-size distribution of the suspended solids in runoff water exhibited large variations between st...
Historically, dissolved-oxygen (DO) data have been collected in the same manner as other water-quality constituents, typically at infrequent intervals as a grab sample or an instantaneous meter reading. Recent years have seen an increase in continuous water-quality monitoring with electronic dataloggers. This new technique requires new approaches i...
In the northern Great Lakes States, seepage lakes are considered more vulnerable to acidification than drainage lakes. The ILWAS model, which was developed for drainage lakes in the Adirondack Mountain Region of New York, has been revised for use in seepage lake systems. Contrasts were observed between the Wisconsin seepage lakes and the drainage l...
Thesis (M.S.)--Utah State University. Dept. of Forest Resources, 1990. Includes bibliographical references (leaves 74-79).