GIS data Articles
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Automating drainage direction and physiographic inputs to the CEQUEAU hydrological model: sensitivity testing on the lower Saint John River watershed, Canada
CEQUEAU is a process-based hydrological model capable of simulating river flows and temperatures. Despite an active user base, no facility yet exists for the automatic assembly and input of watershed data required for flow simulations. CEQUEAU can therefore be time-consuming to implement, particularly on large (≥104 km2) watersheds. We detail a new MATLAB toolbox designed to remove this key ...
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Environmental monitoring of spatial-temporal changes using remote sensing and GIS techniques in the Abandoned Yellow River Delta coast, China
On the basis of remote sensing and GIS techniques, the Landsat data obtained in 1978, 1987 and 2000 were used to examine coastline changes in the Abandoned Yellow River (AYR) Delta in China. The coastal land lost and gained illustrations were derived from the extracted coastlines, the rates of coastal change were estimated, and the coastal parts that experienced the biggest changes were ...
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Remote sensing and GIS application for river runoff and water quality modeling in a hilly forested watershed of Japan
The main objective of this study is to present a simplified distributed modeling framework based on the storage balance concept of a Tank Model and by utilizing inputs from remote sensing data and GIS analysis. The modeling process is simplified by (1) minimizing the number of parameters with unknown values and 2) retaining important characteristics (such as land cover, topography, geology) of ...
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Ground Water Monitoring of the City of Hamburg, Germany
Reference Project: Ground Water Monitoring of the City of Hamburg, Germany Hamburg is the second-largest city in Germany with approx. 4.3 million inhabitants. The Hamburg Environmental Authority manages a constantly growing data base containing data from more than 10.000 ground and surface water monitoring points. With the help of this data base the authority is able to provide information about ...
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Bringing Life To The Dead – How Halifax Water Unlocked The Value Of Valve Inoperability
Wachs Water Services recently gave the Canadian municipal water sector an impressive demonstration of how their unique approach, field experience and mechanical advantage could coax non-functioning valves back to operational life. Halifax Water recently found itself in a jubilant mood after freeing up a significant amount of dollars originally earmarked for valve replacement within its capital ...
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Fourier polynomial approximation of estuaries water salinity in the Sundarbans region of Bangladesh
The geographical location, characteristics of the coastal region and the monsoon climate render Bangladesh highly vulnerable to natural disasters. The reduction of upstream fresh water in the Ganges basin caused for high saline water penetration in the estuaries of the Sundarbans region. The five estuaries namely Baleswar, Bangra, Kunga, Malancha and Raimangal are highly affected by saline water ...
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Statewide souce water assessment
Client: Kansas Department of Health & Environment Completion Date: June 2003 Services Provided Program management Internet tool development GIS with data file integration Education Recruitment Training Public involvement Source water assessments Project Summary Burns & McDonnell served as the project administrator for the Kansas Source Water Assessment Program. ...
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Modeling the impact of land use changes on river flows in Arror watershed, Elgeyo Marakwet County, Kenya
Water scarcity has become a serious global problem. Therefore, there is an urgent need to understand land use changes in watershed areas and their impact on river flows. This study models the impact of land use changes on river flows in the Arror watershed in Elgeyo Marakwet County, Kenya. The primary study sources included remotely sensed and socio-economic data. Landsat 5 thematic mappers ...
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City of Billings: Complex Floodplain Issues - Case Study
In 1937, a major flood of Yellowstone River tributaries devastated Billings, Montana. Despite the vulnerability of the community that this event revealed, the floodplain was not accurately delineated for decades. The reason for this delay in mapping was due to two factors: 1) lack of available funding and 2) exceedingly complex flow patterns in the developed floodplain. Recently, however, a ...
By Innovyze
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Major Urban City Projected To Save $77 Million Over Next Decade From Valve And Hydrant Asset Assessment Program
For large urban cities, one of the quickest ways to realize an investment return from their network of underground assets is to inventory the water distribution system and assess the overall condition of valves and fire hydrants. This progressive major southeast U.S. city recognized the value of getting a comprehensive handle on the condition and usability of its aging control assets. The city, ...
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Visualizing the stories data can tell
Scientists and technologists are turning numbers about everything from condors to ocean-floor contours into visual representations of environmental issues. We’re living in an era of Big Data, but too often it’s nothing more than a fire hose of numbers and data sets that most would have difficulty understanding. Increasingly, though, entities such as non-governmental organizations, ...
By Ensia
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Study of salt content in Harlingen canals - Case Study
Antea Group uses AP-5000 for salinity measurements in Frisian surface water Commissioned by the municipality of Harlingen, Antea Group measured the salinity of the Harlingen canals in Friesland. A motorboat with an advanced mobile multiparameter probe was used to travel the length of the canals and conduct the measurements. Project Manager Jeroen Kruse talks about the project, the outcome of ...
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Integrating GIS and Groundwater Modeling Technologies for SWAPP Development
Groundwater Modeling and GIS Technologies: Powerful Tools for Data Integration and Analysis Groundwater modeling and Geographic Information System (GIS) technologies are useful tools for developing a Source Water Assessment and Protection Plan (SWAPP) to assist planners in protecting groundwater ...
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What Kenya’s biggest slum can teach us about saving cities from floods
An innovative design firm is using data and community outreach to protect Nairobi's poorest residents from devastating storms. Try navigating the soggy, waterlogged slopes of Kenya’s largest slum, with its hundreds of thousands of ramshackle houses, and you’ll quickly realize why Kibera is named after a Nubian word meaning “jungle.” Pasted and propped along the banks of ...
By Ensia
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Greenville Utilities Commission - Optimizing Pressure Transient Monitoring With Data-Driven Monitor Placement - Case Study
The Greenville Utilities Commission (GUC) provides electric, water, sewer, and natural gas services to more than 135,800 customers in Greenville and across Pitt County, North Carolina. The utility’s distribution network is composed of approximately 70% polyvinyl chloride (PVC), 20% asbestos-cement (AC) and 10% cast iron pipelines. Providing a reliable supply of water while effectively ...
By Syrinix Ltd
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Petrobras - Offshore Oil Field Monitoring - Case Study
Realtime offshore oil field monitoring for detection, verification, and classification of oil types brings the industry from a reactive to proactive behavior. Early warning, day or night, with exact levels of hydrocarbon in the sea. No more false positives / alarms from OSD radars; no more waiting for satellite. No more water sampling that needs to be sent to the lab. Ocean Visuals has been ...
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Modeling the spatial pattern of farmland using GIS and multiple logistic regression: a case study of Maotiao River Basin, Guizhou Province, China
Land use change is an important topic in the field of global environmental change and sustainable development. Land use change modeling has attracted substantial attention because it helps researchers understand the mechanisms of land use change and assists regulatory bodies in formulating relevant policies. Maotiao River Basin is located in the province of Guizhou, China, which has a developed ...
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Digital Transformation of Field Operations in a Water Utility Company Using GIS Cloud - Case Study
Digitizing the process of field data collection and infrastructure data management utilizing the GIS Cloud platform, Liburnian waters achieved a multilevel collaboration with local governments, increased their data accuracy, and reduced job timeframe by eliminating paper forms. The implementation of field inspection via surveys on mobile phones had the biggest impact on their workflow, the ...
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Integration of Subsurface Data Management and GIS to Facilitate Model Calibration
Abstract The development of numerical codes, as well as pre- and post-processors to support these codes, has made the discipline of groundwater modelling increasingly more automated and efficient. The value of such modelling is reliant on the site-specific data used to build and calibrate the models. The integration of EarthSoft's EQuISÒ Geology and any of several popular modelling environments ...
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Mapping Water Taps to Ensure WASH Infrastructure and Safe Drinking Water for the Entire Population of Kumba (Cameroon)
Ensuring safe and clean water for the people across Africa is one of the greatest problems on the continent. Water sources are often miles from towns and villages, so people are forced to spend hours each day simply finding and transporting potable water back to their homes. In the city of Kumba (Cameroon), displaced people settled in their farms lack safe water access, and most of them and ...
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