Hydrologic Networks

Hydrologic networks comprise many types of gauges and sensing stations for the purposes of flood forecasting, dam safety monitoring, and water resources management. OneRain has designed, built, rehabilitated, and maintains many hundreds of gauges and advanced flood early warning systems, throughout the United States. Each gauge or system is tailored specifically to the customers’ needs. Our experience extends across dense urban areas through highly remote locations and very diverse environments. While each system is unique and warrants its own individual approach, below are the core elements to OneRain's approach and best practices for designing highly robust, reliable, and maintainable hydrologic data collection and real-time monitoring networks.

Critical operations require dependable and accurate environmental status information
These critical water-monitoring applications demand highly reliable, rugged sensor and well-maintained telemetry networks that comprise a wide range of condition monitoring gauge instrumentation and sensors such as rainfall, float switches, stream and stage, vibrating wire piezometers, tiltmeters, inclinometers, seismic, reservoir elevation, spillway flow, discharge, wind speed, and full weather stations.

Critical operations require dependable and accurate environmental status information

Critical water-monitoring applications demand highly reliable, and well-maintained telemetry networks that comprise a wide range of condition monitoring gauge instrumentation and sensors such as rainfall, float switches, stream and stage, vibrating wire piezometers, tiltmeters, inclinometers, seismic, reservoir elevation, spillway flow, discharge, wind speed, and full weather stations.

Automatic Rain Gauge and Weather Station at Bottom Hollow DamConsider the performance of your network from end-to-end

Having control of your data from the start-point to the end-point is highly important:

  • Optimizing the location of sensors for early detection and warning
  • Well-maintained and calibrated instrumentation to ensure good quality data
  • A robust and dependable communications architecture
  • Centralized multi-sensor data collection, processing, analysis, QA/QC, and dissemination
  • Highly available and timely reporting of accurate and relevant information
  • Meaningful visualization for rapid interpretation and better decision making
  • Timely alert notififcations with actionable information getting to the right people

Hydrologic Network Optimization and Design

On-site Gauge Network Survey and Maintenance Performance

Image Scene Hydrologic LakeOneRain provides on-site analysis of the current condition of your gauge network as well as any new sites you are considering. To accomplish this, senior members of our Field Support staff, escorted by someone from your staff, visit each site. We also review all prior maintenance activities and records you can provide, to highlight best maintenance practices and any deficiencies in the current maintenance regimen.

Transmission, Data Analysis, and Base Station Evaluation

We retrieve as complete a raw data record as possible from your current base station software and analyze the historical data to determine the effectiveness of your current system, including gauging technology, gauge siting, gauge density, data collection (including any erroneous or missing reports) and data storage.

We interview your staff to discover what they believe are problems and strengths of the system, including any IT constraints/requirements. We consider and potentially recommend architectural changes to enhance the system’s reliability, resiliency, and survivability during a major event.

image rain weather station roof-topWe examine our records for creation of archive quality gauge-adjusted radar rainfall (AQ-GARR), and will use the AQ-GARR data to verify or disconfirm suspect data from individual rain gauges.

Personalized Delivery

The results of these efforts will be a system-wide analysis of current conditions, maintenance practices, and recommendations, presented as a detailed report noting our findings and suggesting action that will correct current problems, improve performance, and enhance reliability. We prefer to present a draft report in person with a formal final report following the draft presentation.