Why do we need hydrographic & sediment studies?

HOA’s approach us and ask great questions. Below is a retention basin. Basins are designed to fill with water during storms and discharge the water effectively. Debris and sediment often accumulate overtime causing problems. This image shows sediment thickness found by sediment probes & sonar technology. It’s vital to know how much sediment and other material accumulates in retention basins to insure that it is functioning properly.

Post Dredge Mapping

This is a cool map of a recent post dredge map showing how far they are above and below grade! #bathymetry #dredging #hydrography #sedimentstudies #mappingnetwork

Retention Pond Management

A hydrographic and sediment study was recently conducted on a retention pond to provide a information to help with proper management. It’s important to know how much sediment and other material accumulates in retention basins to insure that it’s functioning properly. The image below shows the sediment thickness found by the sediment probes and sonar technology.

Dredge Progress Map

The Mapping Network provided an interim post-dredge survey for a Department of Natural Resources.  We provided a hydrographic survey and created a comparison model to calculate the amount of sediment removed from the area.

Hydrography and UAV/Drone Survey for Water Capacity Analysis

The Mapping Network conducted a hydrographic and topography survey for several trout ponds.   They utilized Odom Sonar,  Trimble RTK GPS, and Hypack to create the bathymetry.  For the topography they used Trimble RTK GPS for control and a UAV / Drone to collect the images that produced the orthographic image and topography contours.  All data was then input into ArcGIS for final processing.

Watershed approach to management

The Mapping Network just completed a lake survey for a property owner association.  The lake has experienced significant sediment in the coves and main river inlet over the years.  The Mapping Network sampled the sediment structure and mapped the sludge thickness to help the client in the dredging bid process.  Part of the report included understanding sources of sediment and how activity within the watershed will ultimately affect the lake.   Below is a map showing…

Coal Ash Pond Bathymetry and Dredge Survey

The Mapping Network performed a hydrographic and dredge survey for a power plant’s coal ash ponds. These can be difficult because of the composition of material.  With the combination our sonar, GPS, and years of experience with coal ash, we were able to give them an accurate estimate of ash volume.

Dredge Channel Planning Using Soft Sediment Analysis

The Mapping Network performed a pre-dredge and sediment study on a county reservoir.  Their mission was to locate a historic channel buried under several feet of soft sediment. The Mapping Network had to carefully examine the sonar readings and sediment probe information to best locate the channel.  The result of the analaysis providing accurate information to plot the idea course for the dredger to input into their Dredgepak software system.