Sediment Retention Articles & Analysis
15 articles found
Previous studies have founded the Spartina alterniflora invasion induced changes in sediment N-cycling compared to native communities, including increased sediment N accumulation and improved N fixation rates. It has also been reported that Spartina alterniflora invasion increased N loss in Scirpus mariqueter and Phragmites australis sediments. ...
Inside our generators several stages through which the generated water circulates. These are: sediments, ultrafiltration, activated carbon and mineralization. These filters add to the double filtration of the air to clean the water that is created from the humidity. The sediment filter is responsible for the retention of solid particles and the ...
Phathom’s technology is helping to safeguard the environment on one of Auckland’s next-generation residential developments: Whenuapai Village, a 41 hectare residential Special Housing Area north of Auckland. Sediment controls are vital on such a site, especially in the rainy season when topsoil washes ...
ByPhathom
As water flows through the pipe, chitosan lactate dissolves in the water and coagulates sediment particles. The dissolution rate will depend on the various conditions, resulting in inconsistent and often unpredictable dose rates. ...
An investigation of the effect of baffles on retention pond performance using a physical model of an existing sediment retention pond is presented. ...
Specifically, Fe-poor sediments and polymixis interact to cause episodic releases of highly bioavailable phosphorus (P) from sediments, lowering nitrogen-to-phosphorus (N : P) ratios in the euphotic zone, and stimulating the proliferation of harmful cyanobacteria. Below, we provide our rationale for each component of this hypothesis. First, Fe-poor ...
In a new study in the journal Science, researchers explore how sinking land — caused by less sediment reaching deltas along with human activities such as development and resource extraction — combined with sea-level rise will affect coastal delta communities. ...
ByEnsia
Comprehensive hydraulic analysis of sediment retention ponds is commonly achieved through interpretation of residence time distribution and derivation of indices associated with short-circuiting and mixing. ...
In this study, we calculated 31 years (1980–2010) of total suspended sediment (TSS) inflow and outflow of the Atchafalaya River to quantify the long-term sediment retention in the basin. We then estimated sedimentation rates in the basin by spatially relating the retention with changes of turbid water area ...
Retention–detention basins are important structures for managing stormwater. However, their long-term operation raises the problem of managing the sediments they accumulate. Potential uses for such sediments have been envisaged, but each sediment must be characterised beforehand to verify its harmlessness. In this paper ...
The 1.6 ha system consisted of a sedimentation basin (1.4 d hydraulic retention time) followed by two wetlands (5–6 d hydraulic retention time). ...
It also increases the sedimentation and nitrogen retention capacities of the Nemunas catchment. It has been estimated that about 40% of the fine suspended sediments can be retained and deposited in the flooded meadows of the delta. ...
We evaluated abiotic and biotic processes to better understand the role of sediments in determining stream water dissolved P concentrations. Sediment and stream water samples were collected during low discharge from 105 streams across Illinois and analyzed for equilibrium P concentration at zero release or retention (EPC0), P sorption ...
Inflow and outflow water volumes were monitored continuously and weekly water samples were collected to measure total P (TP), dissolved-reactive P (DRP), and bioavailable P (BAP). Suspended sediment was characterized and fractionated into five operationally-defined P fractions (i.e., NH4Cl, bicarbonate-dithionite, NaOH, HCl, residual) to evaluate particulate P (PP) ...
Decreased concentrations and slower cycling of nutrients and increased grazing by cladocerans probably affected the declined biomass of cyanobacteria. Less intensive sediment disturbance and increased phosphorus-retention in fast growing fish biomass may have turned the role of the fish assemblage from ‘nutrient recycler’ to ‘nutrient storage’. ...