Weather Observation System Articles on Environmental XPRT

Improvement of perturb and observe MPPT method for photovoltaic systems: case of study

Maximum power point tracking system is widely used to maximise output power of photovoltaic array. A crucial issue of this system is an algorithm of maximum power point seeking. Well–known perturb and observe technique is optimal solution in terms of the ratio of cost and efficiency. However, this algorithm has some disadvantages such as oscillation around a maximum power point and decrease in ...

Apr. 1, 2013

By Inderscience Publishers

Lifesaving weather warnings thanks to professional visibility sensors

The new Lufft visibility sensor VS20k is now officially available. But what distinguishes it from the previous model and for which applications is it suitable? In the following article, you learn more about the new Lufft visibility sensor family… Reduced visibility – a risk for all traffic users Traffic accidents, flight cancellations and delays: Reduced visibility is ...

May 19, 2017

By G. Lufft Mess- und Regeltechnik GmbH

Weather and climate change: a game with loaded dice

The past decade has been one of unprecedented weather extremes. Scientists of the Potsdam Institute for Climate Impact Research (PIK) in Germany argue that the high incidence of extremes is not merely accidental. From the many single events a pattern emerges. At least for extreme rainfall and heat waves the link with human-caused global warming is clear, the scientists show in a ...

Mar. 25, 2012

By GLOBE Foundation

Development of method for X-band weather radar calibration

Calibration of the X-band LAWR (Local Area Weather Radar) is traditionally based on an assumed linear relation between the LAWR radar output and the rainfall intensity. However, closer inspection of the data reveal that the validity of this linear assumption is doubtful. Previous studies of this type of weather radar have also illustrated that the radar commonly has difficulties in estimating ...

Oct. 16, 2013

By IWA Publishing

Improved wet weather wastewater influent modelling at Viikinmäki WWTP by on-line weather radar information

Municipal wastewater treatment plant (WWTP) influent is typically dependent on diurnal variation of urban production of liquid waste, infiltration of stormwater runoff and groundwater infiltration. During wet weather conditions the infiltration phenomenon typically increases the risk of overflows in the sewer system as well as the risk of having to bypass the WWTP. Combined sewer infrastructure ...

Aug. 8, 2013

By IWA Publishing

Safe Landings Whatever the Weather: Lufft Sensors on Airports

Pilots, air traffic controllers and airport operators do their best to make air travel safer and more efficient. Sometimes, however, flight security depends on external factors we can hardly influence. This especially refers to risky weather conditions: Strong winds, icy cold or strong precipitation can have serious consequences. On average, 23% of all aircraft accidents and 68% of canceled ...

Nov. 28, 2016

By G. Lufft Mess- und Regeltechnik GmbH

Real time, high resolution regional weather and air quality forecasting system in West Macedonia, Greece

This paper presents an overview of the University of Western Macedonia's (UoWM) operational model for predicting the prevailing meteorological and air quality conditions on a high resolution (2 × 2 km²) scale. The MM5 – SMOKE – CMAQ has been suitably parameterised with respect to the particular geographical and climatic characteristics of the region of West Macedonia. The system is designed to ...

Feb. 8, 2011

By Inderscience Publishers

European Flood Alert System Post-Event Summary Report: The Alpine Floods of August 2005- What Did EFAS Forecast? What Was Observed? Which Feedback Was Recieved From End-Users?

From the 22nd until 27th August 2005, the northern Alpine region was hit by severe floods. The floods occurred in tributaries of the Rhine River in Switzerland and Austria (Vorarlberg) and in several tributaries of the Danube River in Germany (Iller, Lech, Isar), Austria (Lech, Inn, Mur, Drau/Drava, Raab/Raba) and Hungary (Mur and Raba/Raab), as well as in the German part of the Danube. The ...

Jan. 1, 2005

Technical brief - FR standards for weather protection & containment enclosures

Introduction The worldwide market for temporary enclosures has steadily increased over the last two decades as facility owners, engineers and contractors recognise the safety benefits and cost-effectiveness of installing temporary enclosures. Apart from minimising weather-induced delays to a project, scaffold sheeting enhances site safety by preventing debris and small objects from falling ...

Jun. 30, 2012

By Industrial Textiles & Plastics Ltd.

Case study - Weather stations for the 2014 Winter Olympic Games in Sochi

For real-time meteorological data at the XXII Winter Olympic and XI Winter Paralympic Games in Sochi from February–March 2014, 29 specialized automatic meteorological stations (AMS) were installed in the areas close to the Olympic sport venues from 2010-2013. This was in addition to the regular observation network that provided data for the weather now-casting system supplied and ...

Jan. 18, 2017

By The OTT Hydromet Group

How Your Road Weather Stations Remain Precise into Old Age

When the temperature is below zero and the fog settles on fields and trees like a veil, the world becomes white as in a fairy tale. But what seems so idyllic white entails risks, because the road is now covered by a fine white ice layer. No one can see with the naked eye how thick or slippery this ice layer is exactly. This can only be measured by technical assistants such as automatic ice ...

Dec. 13, 2016

By G. Lufft Mess- und Regeltechnik GmbH

Urban pluvial flood prediction: a case study evaluating radar rainfall nowcasts and numerical weather prediction models as model inputs

Flooding produced by high-intensive local rainfall and drainage system capacity exceedance can have severe impacts in cities. In order to prepare cities for these types of flood events – especially in the future climate – it is valuable to be able to simulate these events numerically, both historically and in real-time. There is a rather untested potential in real-time prediction of urban ...

Oct. 11, 2016

By IWA Publishing

Advanced offshore measurements to support wind energy production, weather forecasting, and emergency response

Sonoma Technology, Inc. (STI), with support from the Bureau of Ocean Energy Management, is leading a unique partnership of corporate, government, and university researchers to develop a marine environmental observations program in the Gulf of Mexico. The primary goal of this project is to develop a framework of advanced offshore measurements to support emergency response, oil and gas exploration ...

Sep. 14, 2013

By Atmospheric Systems Corporation (ASC)

Treating Wet Weather Flows In a Membrane Bioreactor: Changes in Mixed Liquor Properties Cannot Be Neglected

Data from two unrelated pilot-scale submerged membrane bioreactors (SMBRs) studies are presented. Both SMBRs treated wastewater from combined sewer systems on the west coast of the United States: a flat sheet Kubota SMBR in Seattle, Washington (KC SMBR) and a hollow fiber Zenon SMBR in San Francisco, California (SF MBR). The SF SMBR was operated for a total of 834 d, through 3 rainy seasons, and ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Continuous Modeling of Wet Weather Strategies Annual Water Quality Results Support a Municipality’s Decision-Making Process

ABSTRACTAn extensive water quality modeling effort for the City of Columbus Long Term Control Plan (LTCP) was performed in order to evaluate future scenarios to abate combined sewer overflows. This modeling effort was supported by a massive data collection program and employed three different models to analyze the receiving streams. Once the models were selected and calibrated, continuous annual ...

Oct. 22, 2006

By Water Environment Federation (WEF)

New report connects 2012 extreme weather events to human-caused climate change

As extreme weather events like wildfires, heat waves, downpours, and droughts continue to make headlines in the United States and around the world, many have wondered what their connection is to climate change. A new report sheds some light, firmly drawing correlations between several extreme weather events in ...

Sep. 6, 2013

By World Resources Institute WRI

Validation of a mass consistent flow model as part of a decision support system

In the context of real time (online) decision support systems for nuclear installations, atmospheric dispersion and deposition has to be calculated for a mesoscale area. Typically, the wind field in this area is influenced by topography. Therefore, simple Gaussian type modelling is not appropriate. Initiated and funded by the Bundesamt fur Strahlenschutz, simple (diagnostic mass consistent) flow ...

Jan. 26, 2004

By Inderscience Publishers

Assessment and improvement planning for the Rochdale South sewerage system

Rochdale South is a predominantly residential suburb south of the Queensland capital city of Brisbane. It has a total population of 10,680 and a sewerage system catchment area of 580ha. The sewerage system includes five pumping stations which forward sewage flows to a downstream treatment plant. Rochdale South comes under the jurisdiction of Logan City Council, and Logan Water is the body that ...

Mar. 24, 2008

By Innovyze

A brief statement of airport applications for doppler SODAR systems

Doppler SODAR Operating similar to a sonar the Doppler SODAR (Sonic Detection and Ranging) directly measures the atmospheric wind speed and direction at multiple altitudes simultaneously. These systems utilize the Doppler effect imposed on the received acoustic signal echoed by the atmosphere for the wind measurements. The Doppler effect is the common observation that the acoustic signal ...

Sep. 14, 2013

By Atmospheric Systems Corporation (ASC)

Comparison of short-term rainfall forecasts for model-based flow prediction in urban drainage systems

Forecast-based flow prediction in drainage systems can be used to implement real-time control of drainage systems. This study compares two different types of rainfall forecast – a radar rainfall extrapolation-based nowcast model and a numerical weather prediction model. The models are applied as input to an urban runoff model predicting the inlet flow to a waste water treatment plant. The ...

Jul. 19, 2013

By IWA Publishing

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