Kleinfelder Inc. utilized SoilVision software program SVFlux 3D to evaluate sections of levee located in Northern California. The existing levee section contained numerous features including a landside irrigation ditch, and pumping plant sump at the landside toe of the levee, a highway embankment intersecting the levee, and/or existing pipes extending through the levee embankment. Due to the importance of these features, continuous construction of a slurry cutoff wall was not feasible to mitigate potential underseepage and through seepage. Therefore, small windows in the slurry cutoff wall were proposed to be left open during construction to allow continuous use of these facilities. Seepage analysis at these locations was performed to evaluate the three dimensional effects including end effects of seepage through these proposed cutoff wall windows. SVFlux 3D provided a platform capable of analyzing the difficult features present at this project location. Another three-dimensional seepage modeling program was previously used for this project and results calculated with SVFlux 3D confirmed those previous results. The SVFlux modeling program is a great tool to evaluate difficult situations involving levee geometry, topographical features, existing construction, and proposed construction. Kleinfelder would recommend this program to other consultants who may need additional tools to understand seepage conditions which may affect project design and construction.
Supplemental Aeration Nearly Eliminates Filamentous Sludge Bulking in Dubai
The Dubai Investments Park Wastewater Treatment plant in the United Arab Emirates faced challenges in their oxidation ditch due to filamentous sludge bulking, resulting in poor sludge settling in the secondary clarifier. Supplemental aeration was needed to eliminate the filamentous sludge bulking. Challenge: The oxidation ditch is treating an average of 2.64 MGD (10,000 m3/day) of wastewater, composed of seventy percent municipal and thirty percent industrial waste streams. High organic loads, summer heat and low...
Irrigation Water Flow Measurement with Greyline AVFM Area-Velocity Flowmeter - Case Study
The United Irrigation District (UID) in Southern Alberta, Canada serves 34,400 acres of rural land through a series of canals, channels and pipelines running 236 km throughout the region. Water is a valuable resource in the warm, arid regions of the province and agriculture uses 60-65% of the fresh water consumed. So water use is closely regulated and monitored. Submerged Ultrasonic Sensors Installed in Concrete Culverts Fred Rice, Manager of the United Irrigation District was looking for a flowmeter that did...
Do you know the two most important words required to understand oil spill booming?
Much has been written (incorrectly) about how to deploy boom in order to protect, deflect or contain oil. We have long promoted using math and science when deploying spill countermeasures not only because it works, but because it’s faster, safer, more effective and it saves time, money and impact. What we’ll focus on in this article is the where of boom deployment. When it comes to understanding where to correctly deploy boom during an oil spill incident, it’s important to understand that...
Report documents effects of 40 years of groundwater withdrawal
The cumulative effects of 40 years of groundwater withdrawals in the Houston-Galveston region are documented in a report from the United States Geological Survey. Decades of extensive withdrawals have caused the land to sink, or subside.The Houston-Galveston region is one of the largest areas of land surface subsidence in the U.S., according to the agency. Water withdrawals started as early as 1836, but routine, precise data gathering in the region began in the 1970s. The information has been used to inform water...
Delta Drainage and Irrigation System - Case Study
BackgroundDelta, British Columbia is located in the Fraser River delta on the shores of the Pacific Ocean, just south of the City of Vancouver. Delta comprises mostly agricultural land, with typical ground elevations near sea level. Levees protect the area from potential floods from the Fraser River and tidal surges from the Pacific Ocean.Of the 13,500 hectares (ha) watershed, 6,300 ha is active agricultural land, 3,500 ha is the environmentally sensitive Burns Bog, and the rest is a mix of urban and industrial...