water monitoring Articles
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Custom Staff Gages – A Unique Service Provided by Stevens Water
Stevens Water Monitoring Systems was the original designer of the style A, C, E, I and M staff gages and continues to be a leading supplier of these standard staff gages styles. A unique service offered to Stevens customers is the design of custom staff gages for special applications. Custom staff gages are ideal for unique mounting angles, slopes, flow measurements, larger display needs, or ...
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100 Years of History and Innovation - Stevens Water Monitoring Systems
Stevens Water Monitoring Systems is approaching an important milestone in 2011: our 100 year anniversary. As we prepare to bring exciting new products and services to market in 2011, we’d like to take a look back at our heritage as America’s first water level instrumentation company and reflect on what has made Stevens Water the company it is ...
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Stevens equipment records historical information during tsunami - Case Study
On the eve of the discontinuation of Stevens chart recorders, we are republishing the following article about the highest profile contribution that our products have made in their 116 year history. This article was originally published in the Stevens Water Monitor newsletter in 2007. One of the longest lived products in water resource monitoring has been the Stevens’ chart recorder. In ...
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Physicochemical parameters of natural waters
All freshwater bodies are interconnected to the oceans, the atmosphere, and aquifers via a complex hydrological cycle. Wetlands, icecaps and biopheric water also participate in the continuous conveyance of water on planet Earth. The Earth’s hydrological cycle is driven by evaporation and gravity on which ecosystems and human societies depend. Growing populations may put stresses on natural waters ...
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Staff Gages Overview
Stevens’ environmentally rugged staff gages provide a quick and easy visual indicator of water level and flow. Every water level monitoring station should include a staff gage from which the height of the water may be visually and easily compared to any data logger’s reported measurement. Enamelled iron gages are preferred over other type gages (such as painted gages) since ...
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What You Don’t Know About Snow: The USDA’s SNOTEL Network is Playing a Critical Role in Protecting Water Resources in the Western United States
There are many complex political, social, environmental, and scientific challenges surrounding water resources in the western United States. Water is scarce and does not occur when and where people need it the most. According to the US Geological Survey (USGS), about 80 percent of fresh water used in the western United States is appropriated for irrigation. Over the past 150 years, society has ...
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CBRN Water Monitors
WANTED: CBRN (Chemical, Biological, Radiological, Nuclear) Water Monitors A recent survey by Environmental Protection Agency personnel found that Technical Associates is currently the sole source, worldwide, to provide comprehensive instrumentation for real time monitoring of radionuclides, chemicals, and biological contaminants in drinking water and wastewater. Information on the complete CBRN ...
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Jamaican Water Resources Authority Ensures Reliable Water for 2.8 Million Island Residents
For over fifty years Jamaica has undertaken comprehensive water resource management and forecasting in order to ensure adequate and safe water supplies are available country-wide. This has been achieved by the Jamaican Water Resources Authority (WRA) through a combination of direct planning, resource monitoring, data analysis, and a great level of cooperation between government and ...
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Evaluation of the Stevens HydraProbe Temperature Measurements from -30 to +40 Degrees Celsius
Soil temperature data down to -30° Celsius is becoming more and more relevant to climate studies. While environmental issues fuel the development and the widespread use of sophisticated environmental models, reliable input data is becoming essential for researchers and modelers. The soil temperature data collected by the HydraProbe can be used in climate studies in arctic regions, regional ...
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Stevens-Connect Helps Florida DEP Monitor Water Resources and Plan for the Future
The Florida Department of Environmental Protection (FDEP), in conjunction with several other State agencies, recently launched a new data monitoring program to provide insights into many Florida waterways. With the objective of easily sharing water and weather data between State and Federal agencies and with the general public, FDEP chose to utilize Stevens-Connect system to process, display, ...
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Advances and current changes in cellular telemetry
Recent advances in cellular technology are offering more efficient and reliable wireless transmission of data between remote locations and the central collection points.Wireless telephone technology has been around in various forms since the 1940’s. Stevens was the first company to introduce telephone telemetry technology for remote water monitoring with the Telemark in 1939. In 1969, Bell ...
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Measuring the Soil Water Retention Curve with the Stevens pF Matric Potential Sensor and Hydra Probe II Soil Moisture Sensor
The Stevens pF Sensor is a unique matric potential probe, which is used to measure the soil water potential of a soil - the force with which water is held within the soil and how much energy is needed to overcome this force to extract water from the soil. Unlike traditional tensiometers such as gypsum blocks, the Stevens pF Sensor utilizes a patented heating element to measure soil water ...
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Method for irrigation scheduling based on soil moisture data acquisition
The water requirements of crops are dependent on evapotranspiration (ET), soil chemistry, and the crop’s maximum allowable depletion (MAD). Direct measurements of root zone soil moisture, water application along with published ET values and soil textures, can be used in a soil water balance model that can significantly optimize irrigation efficiency. Over the past five years, advancements in ...
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AquaLab Analyzer provides real-time phosphorus measurement in Everglades
When it comes to ecosystem sustainability, Florida is no backwater. The South Florida Water Management District, which includes the unique Everglades habitat, had a major challenge. The EPA and various governmental authorities have defined limits for many water quality parameters to support a water body’s designated use. Any physical, chemical or biological condition that threatens the designated ...
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Summary of 2018 MOISST Workshop
Stevens recently sponsored the 2018 MOISST Workshop: From Soil Moisture Observations to Actionable Decisions, which was held June 4-7 in Lincoln, Nebraska. This workshop provided a unique opportunity for leaders in soil moisture research and development to come together in an interactive workshop format to exchange ideas and develop collaborations. This was the eighth ...
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Stevens enhances groundwater remediation effectiveness - Case Study
The Stevens HydraProbe is now being used to monitor the progress of a new groundwater pollution clean up method called phytoremediation. Phytoremediation is the method by which trees are used to pull contamination out of groundwater. Remediation of contaminated aquifers can take many years to complete. The need for clean, healthy rivers, lakes and streams has stimulated ...
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The Future of Data Acquisition: Will the Internet`s Cloud-Computing Replace the Data Logger?
Electronic data loggers have been integral instrument in automation of data collection since their inception with widespread adoption beginning in the 1980’s. Data loggers are used across a variety of industries requiring automated data collection – applications include remote water resource monitoring, weather conditions, machine monitoring, gas and oil projects, building HVAC ...
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OSU researchers deploy Stevens equipment in study of green infrastructure treatment for groundwater runoff - Case Study
Stormwater runoff pollution is a serious issue that faces almost every urban and suburban environment. In older city infrastructure, runoff from roofs, parking lots, and streets flows directly into the sewer system and must be handled by the municipal wastewater treatment facility, increasing the amount of work the system must undertake. For the past 30 years, the infrastructure for ...
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Flow Analysis – Meteorological Technology International Magazine Published Article
Many complex political, social, environmental and scientific challenges impact water resources. Snow telemetry (SNOTEL), one of the world’s largest meteorological networks, working under the US Department of Agriculture (USDA), provides critical stream flow predictions for the understanding of hydrology in western USA. For more than 100 years, predicting stream flow has been important for ...
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Wireless Real-Time Soil Data from Stevens Hydra Probe Soil Sensors Used In Contaminated Soil Cleanup Operation
Up until the early 1970s when The US Congress passed The Clean Water Act, industrial chemicals and petroleum products were routinely dumped onto the ground or poured down wells. In those days, few people understood groundwater hydrology, and disposing of chemical waste underground seemed like a safe and easy solution. Depending on the chemistry, underground pollution can linger for centuries, ...
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