نتایج جستجو برای: sediment control

تعداد نتایج: 1363410  

2014
Reef K. Junjie Nicola K. Browne Paul L. A. Erftemeijer Peter A. Todd

Sediment loads have long been known to be deleterious to corals, but the effects of turbidity and settling particles have not previously been partitioned. This study provides a novel approach using inert silicon carbide powder to partition and quantify the mechanical effects of sediment settling versus reduced light under a chronically high sedimentary regime on two turbid water corals commonly...

Journal: :E3S web of conferences 2023

There were huge sediment yielding and deposition due to debris flows by breaking natural landslide dams which formed earthquake in 1858 at upstream reach of Joganji River. Sediment transportation is still active flow with bedload rainfall, though a lot erosion control have been constructed. Continuously measuring runoff for long term along main river necessary evaluate the propagation after eve...

Journal: :desert 2013
k. nosrati h. ahmadi f. sharifi m. mahdavi m.r. sarvati

uncertainty associated with mixing models is often substantial, but has not yet been fully incorporated in models. the objective of this study is to develop and apply a bayesian-mixing model that estimates probability distributions of source contributions to a mixture associated with multiple sources for assessing the uncertainty estimation in sediment fingerprinting in zidasht catchment, iran....

Journal: :Ecological applications : a publication of the Ecological Society of America 2011
Jason P Field David D Breshears Jeffrey J Whicker Chris B Zou

Rangelands are globally extensive, provide fundamental ecosystem services, and are tightly coupled human-ecological systems. Rangeland sustainability depends largely on the implementation and utilization of various grazing and burning practices optimized to protect against soil erosion and transport. In many cases, however, land management practices lead to increased soil erosion and sediment f...

2013
Erini Yuwatini Noriko Hata Hideki Kuramitz Shigeru Taguchi

A higher enrichment of organic pollutant, di(2-ethylhexyl) phthalate (DEHP) was found in estuary of Oyabe River and Jinzu River, Japan. Based on this, the distribution of DEHP between water and bed sediment was investigated as a model of organic pollutant through both the field investigation and laboratory experiment. The laboratory experiment was performed to examine the effect of seawater, or...

Journal: :Chemosphere 2013
Ximei Liang Baowei Chen Xiangping Nie Zhen Shi Xiaoping Huang Xiangdong Li

Antibiotics released into the aquatic environment play an important role in the spread of antibiotic resistance. In the Pearl River Estuary (PRE) and the coastal zone, the concentrations of antibiotics decreased from the Pearl River to the estuary, suggesting that antibiotics primarily originated from river tributaries and terrigenous sources. Within the PRE area, the concentrations of antibiot...

Journal: :Environmental pollution 2015
Cameron G J Hoggarth Britt D Hall Carl P J Mitchell

Using enriched stable (201)Hg injections into intact sediment cores, we provide the first reported Hg methylation potential rate constants (km) in prairie wetland ponds (0.016-0.17 d(-1)). Our km values were similar to other freshwater wetlands and did not differ in ponds categorized with high compared to low surface water concentrations of sulphate. Sites with high sulphate had higher proporti...

2016
J. Chandramohan G. Senthilkumar M. Suresh Gandhi R. Ravisankar

This article contains the chemical and geographical data and figures for the chemical data in sediments of East Coast (Pattipulam to Dhevanampattinam) of Tamilnadu. The obtained data are related to the research article "Heavy Metal Assessment in Sediment Samples Collected From Pattipulam to Dhevanampattinam along the East Coast of Tamil Nadu Using EDXRF Technique" (Chandramohan et al., 2016) [1...

Journal: :Marine pollution bulletin 2014
B Lourino-Cabana G Billon L Lesven K Sabbe D-C Gillan Y Gao M Leermakers W Baeyens

Seasonal variation in trace metal contamination in surface sediments was studied through high resolution profiles assessed monthly by DGT probes in muddy sediments of the North Sea. General parameters such as pH, temperature, dissolved oxygen and sulfides were also recorded to estimate their role in the speciation of trace metals. Experimental data were included in a thermodynamic equilibrium m...

2012
Lorelei J Alvarez Howard E Epstein Junran Li Gregory S Okin

Many arid grassland communities are changing from grass dominance to shrub dominance, but the mechanisms involved in this conversion process are not completely understood. Aeolian processes likely contribute to this conversion from grassland to shrubland. The purpose of this research is to provide information regarding how vegetation changes occur in an arid grassland as a result of aeolian sed...

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