Search results
Results from the WOW.Com Content Network
The user provides the geometry and shear strength parameters for the slope in question and UTEXAS computes a factor of safety against slope failure. The factor of safety for a candidate failure surface is computed as the forces driving failure along the surface divided by the shear resistance of the soils along the surface. [2] UTEXAS employs a ...
Because almost all water bodies are dynamic in their composition, the relevant quality parameters are typically expressed as a range of expected concentrations. They include the natural and man-made chemical , biological and microbiological characteristics of rivers , lakes and ground-waters , the ways they are measured and the ways that they ...
Wastewater quality indicators are laboratory test methodologies to assess suitability of wastewater for disposal, treatment or reuse. The main parameters in sewage that are measured to assess the sewage strength or quality as well as treatment options include: solids, indicators of organic matter, nitrogen, phosphorus, indicators of fecal ...
Diagram depicting the sources and cycles of acid rain precipitation. Freshwater acidification occurs when acidic inputs enter a body of fresh water through the weathering of rocks, invasion of acidifying gas (e.g. carbon dioxide), or by the reduction of acid anions, like sulfate and nitrate within a lake, pond, or reservoir. [1]
The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [3]
In Texas, there are 98 of these districts, covering nearly 70% of the state, according to the Texas Water Development Board. The Upper Trinity Groundwater Conservation District has the following ...
Sunset legislation passed by the Texas Legislature in 2001 changed the agency's name to the Texas Commission on Environmental Quality and continued the agency until 2013. During the special session of the 81st Legislature (2009), legislation was adopted amending the 2013 date to 2011, [ 4 ] when the agency was continued for an additional 12 ...
A study on the trophic classification of Texas reservoirs in 2020 from the Texas Commission on Environmental Quality found that Lake Tyler had a mean chlorophyll-a (Chl-a) level of 11.72 μg/L, a mean Secchi disk depth of 1.46 meters, and a mean total phosphorus level of 0.02 mg/L.