hydrologic monitoring Articles
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Water sensors and hydrological monitoring systems
Background: Flooding could become a nightmare as businesses begin to return to work after months of stay-at-home management.If a storm causes your building to flood, you could lose power and need to move. That's what happened in May after four days of heavy rain flooded a basement in the Chicago area.From this we can see that the use of water sensors and related equipment is very important. Many ...
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Integrated actions in the management of critical hydrologic events
Owing to the increase in urban populations, there has also been an increased incidence of critical events, especially those related to floods and landslides. Since the implementation of the National Civil Defense System in Brazil, a focus on disaster management is no longer the answer when assisting those affected; instead, the answer has become managing disaster risk, in addition to the ...
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The search for orthogonal hydrological modelling metrics: a case study of 20 monitoring stations in Colombia
This paper presents a Colombian-based study on hydrological modelling metrics, arguing that redundancies and overlap in statistical assessment can be resolved using principal component analysis. Numerous statistical scores for optimal operator water level models developed at 20 hydrological monitoring stations, producing daily, weekly and ten-day forecasts, are first reduced to a set of five ...
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Optimal sampling network for monitoring the representative water quality of an entire reservoir on the basis of information theory
This study presents a method for optimal selection of sampling stations for representative and effective water quality monitoring of a reservoir on the basis of information theory. We adopt an objective function used for the design of other hydrological monitoring networks such as rain gauge networks. Unlike rain gauges, in which only a single variable of rainfall is of interest, water quality ...
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CASE STUDIES Rapid Deployment of Hydrological Monitoring Station - Case study
Following a 3.2 magnitude earthquake on September 7th, the water level of the karst river Vrljika started dropping very quickly. This rare phenomenon has last occurred in 2004, and, before that, in 1942. Low water levels of Vrljika can be dangerous for several endemic fish species; and the whole Imotski region gets its water supply from Vrljika. Less than 24 hours after the event, Geolux ...
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Discharge Measurement on Small Channels - Cases Study
To monitor water discharge on a small stream, Geolux has installed HydroStation - highly integrated hydrological monitoring station that consists of radar-based water level sensor, surface velocity radar, Lithium battery pack, solar panel, Geolux HydroCam camera and GPRS datalogger. The station is installed on a bridge above the channel, to measure water level and total discharge. The measurement ...
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A new hybrid drought-monitoring framework based on nonparametric standardized indicators
A drought is a multi-dimensional event characterized by changes in the atmospheric and land conditions. Hence, monitoring a single drought indicator may be insufficient for water management. The hybrid drought index (HDI) is presented as a nonparametric composite indicator for monitoring multiple components of the hydrologic cycle. The properties of the HDI can be summarized as follows: (1) ...
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An evaluation of hydrometric monitoring across the Canadian pan-Arctic region, 1950–2008
This study evaluates the hydrometric monitoring maintained within the Canadian pan-Arctic and is based on the hydrometric gauges closest to northern seas for 76 river systems throughout 1950–2008. Monitoring is quantified by compiling time series of total gauged area and discharge values from the available hydrometric records. We further evaluate the quality of hydrometric data by examining the ...
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Relevance of hydrological parameters in artificial recharge sites selection and assessment in a granitic aquifer
Due to increasing demand of groundwater and indiscriminant pumping, groundwater levels have been declined beyond economic levels and the natural recharge is not enough. Thus enhancing recharge to the groundwater system through artificial means has been evident. Depending on the situation, a variety of methods have been in practice but assessing their efficacy as well as optimal site selection has ...
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Monitoring Station at Lazina, Croatia
Geolux has recently installed an automatic hydrological monitoring station at a location in Croatia. The monitoring station is based on a compact Geolux HydroStation system. It consists of a radar level sensor LX-80, a surface velocity radar RSS-2-300W, a HydroCam camera, SmartObserver datalogger, a 20 W solar panel, and a 20 Ah lithium-ion backup battery. All instruments use contactless methods ...
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Combined interpretation of radar, hydraulic, and tracer data from a fractured-rock aquifer near Mirror Lake, New Hampshire, USA
An integrated interpretation of field experimental cross-hole radar, tracer, and hydraulic data demonstrates the value of combining time-lapse geophysical monitoring with conventional hydrologic measurements for improved characterization of a fractured-rock aquifer. Time-lapse difference-attenuation radar tomography was conducted during saline tracer experiments at the US Geological Survey ...
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Monitoring System for Hydrologic Evaluation of Landfill Covers
Three test sections were constructed and instrumented to assess the hydrologic behavior of earthen final covers at two municipal solid waste landfills. A traditional design using a “resistive barrier” was used for two of the test sections, whereas an alternative design using a “capillary barrier” was used for the third test section. The test sections were built in two distinctly different ...
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Comparing classical performance measures with signature indices derived from flow duration curves to assess model structures as tools for catchment classification
The ability of a hydrological model to reproduce observed streamflow can be represented by a large variety of performance measures. Although these metrics may suit different purposes, it is unclear which of them is most appropriate for a given application. Our objective is to investigate various performance measures to assess model structures as tools for catchment classification. For this ...
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Pesticide transport with runoff from turf: observations compared with TurfPQ model simulations
Received for publication September 30, 2008. Pesticides applied to turf grass have been detected in surface waters raising concerns of their effect on water quality and interest in their source, hydrological transport and use of models to predict transport. TurfPQ, a pesticide runoff model for turf grass, predicts pesticide transport but has not been rigorously validated for larger storms. The ...
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Urban Groundwater Resources Management in Arizona - Case Study
Motivation The Sonoran Desert cities of Phoenix and Tucson face long-term challenges for maintaining sustainable water supplies for existing populations and anticipated future growth. Phoenix and Tucson rely on groundwater to meet a significant portion of their water needs, and both cities are expanding their aquifer storage and recovery operations. Optimized management of these critical (in same ...
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Weather SDM: estimating snow density with high precision using snow depth and local climate
Snow density is an important measure in hydrology used to convert snow depth to the snow water equivalent (SWE). A model developed by Sturm, Tara and Liston predicts the snow density by using snow depth, the snow age and a snow class defined by the location. In this work this model is extended to include location and seasonal weather-specific variables. The model is named Weather Snow Density ...
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An exciting and eventful year is drawing to a close
Best wishes for the holiday season We would like to thank our customers, suppliers and partners for their confidence in our products and your loyalty in 2018. We send everyone best wishes for the holiday season and wish a Happy and Healthy New Year. Our review 2018 A lot has happened at OTT this year: With the integration of the sensor technology manufacturer Kipp & Zonen, the OTT ...
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Lake water levels for calibration of the S-HYPE model
Lake water levels are easy to measure, and can be seen as a transformation of discharge. Water level measurements from 42 lakes in Sweden were analysed, and eight of these lakes were modelled using the Swedish S-HYPE model. The objective was to test if a hydrological model can be calibrated using water level data instead of discharge. A semi-analytical lake routing was developed to resolve ...
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A comparison of single- and multi-gauge based calibrations for hydrological modeling of the Upper Daning River Watershed in China's Three Gorges Reservoir Region
Many parameters in hydrological models cannot be measured directly and should be estimated through calibration. In this study, four separate calibration schemes, including a multi-gauge and three single-gauge ones, were conducted to simulate the daily stream flow of the Upper Daning River in China's Three Gorges Reservoir Region using the Soil and Water Assessment Tool (SWAT). A highly ...
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Hydraulic and Thermal Response of Groundwater–Surface Water Exchange to Flooding in Experimental Aquifer
Summary The effects of flooding on interactions between streams and shallow aquifers are poorly studied due to the unpredictable nature of flooding events. This study examines groundwater-surface water interactions in a constructed experimental meander over several simulated flood events using hydrologic and thermal monitoring. Detailed steady-state hydraulic head measurements were taken of the ...
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