This review summarizes current knowledge on sediment dredging to control eutrophication. Emphasis has been given the effectiveness and environmental impacts of dredging, release nutrients from sediment, response cyanobacterial bloom after dredging. Dredging is an effective method, although its mainly dependent external load. method can improve lake conditions by reducing TP, TN, Chl-a, P-flux, ...

EFFECTS OF HYDRAULIC DREDGING AND VESSEL OPERATION ON ATLANTIC STURGEON BEHAVIOR IN A LARGE COASTAL RIVER Michael R. Barber, B.S. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Biology at Virginia Commonwealth University. Virginia Commonwealth University, 2017. Major Advisor: Dr. Greg Garman, Director of Rice Rivers Center, Center for Enviro...

PURPOSE: This technical note characterizes underwater sound produced by a backhoe dredge during rock removal as part of the widening and deepening of New York/New Jersey Harbor. Both continuous sounds (e.g., engine and generator sounds transmitted through the hull) and repetitive, punctuated sounds (e.g., associated with bucket bottom contact and the repositioning of spuds) comprise a broad spe...

A workshop sponsored by the U.S. Army Corps of Engineers and the U.S. Environmental Protection Agency was held at the U.S. Army Engineer Research and Development Center, Waterways Experiment Station, in Vicksburg, MS, in April of 2006. Fifty experts from government, the private sector, and academia participated in the workshop, which focused on four issues (the four Rs) relevant to environmenta...

There is increasing concern about the replicability of studies in psychology and cognitive neuroscience. Hidden data dredging (also called p-hacking) is a major contributor to this crisis because it substantially increases Type I error resulting in a much larger proportion of false positive findings than the usually expected 5%. In order to build better intuition to avoid, detect and criticize ...

Dredging is a catastrophic disturbance that directly affects key biological processes in aquatic ecosystems, especially in those small and shallow. In the tropics, metabolic responses could still be enhanced by the high temperatures and solar incidence. Here, we assessed changes in the aquatic primary production along a small section of low-flow tropical downstream (Imboassica Stream, Brazil) a...

First Question: Dredging of channels to keep them open to shipping is a recurring and costly activity, especially in cases where channels have to be deepened and maintained to accommodate larger and deeper-draft vessels. There is also the concern of how to dispose of the dredge spoil. How does the Corps balance the cost of dredging and dredge spoil disposal with NEPA requirements and with the e...

Data snooping (mistaking spurious statistical relationships for genuine ones) is an important and dangerous by-product of financial analysis. However, data snooping is a difficult concept to explain to students of financial economics because, by its very nature, it is difficult to illustrate by example (a strong statistical relationship between complex financial variables is difficult to refute...