scholarly journals Water-quality and bottom-sediment-chemistry data for Left Hand Valley Reservoir, Boulder County, Colorado, January-August 1998

1999 ◽  
Author(s):  
R.A. Kimbrough
Keyword(s):  
Water Quality ◽  
Bottom Sediment ◽  
Sediment Chemistry ◽  
Left Hand ◽  
Boulder County ◽  
Chemistry Data

Determining water quality parameters of aquifers in the Vientiane Basin, Laos, using geophysical and water chemistry data

2011 ◽  
Vol 9 (4) ◽  
pp. 381-395 ◽  
Author(s):  
Nils Perttu ◽  
Kamhaeng Wattanasen ◽  
Khamphouth Phommasone ◽  
Sten-Åke Elming
Keyword(s):  
Water Quality ◽  
Water Chemistry ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Chemistry Data

scholarly journals Bottom Sediment Characteristics of a Tropical Lake: Lake Tana, Ethiopia

Hydrology ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 18
Author(s):  
Mebrahtom G. Kebedew ◽  
Seifu A. Tilahun ◽  
Fasikaw A. Zimale ◽  
Tammo S. Steenhuis
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Bottom Sediment ◽  
Total Nitrogen ◽  
Available Phosphorus ◽  
Northwestern Part ◽  
Sediment Characteristics ◽  
Lake Tana ◽  
Sediment Samples ◽  
Water Hyacinths

Sediment concentration of rivers in developing countries has been increasing greatly over the last 50 years due to the conversion of forest to continuously cultivated land with the increasing population. Few studies have addressed its effect on sedimentation and water quality of the lakes by analyzing bottom sediment characteristics. In this study, the objective was to investigate the spatial distribution (and their interrelationships) of the bottom sediment characteristics in the largest lake in Ethiopia, Lake Tana where water hyacinths have been spreading rapidly during the last decade. Sediment samples were collected from the lake bottom at 60 locations and analyzed for texture, organic matter, total nitrogen, and available phosphorus. Bottom sediment samples had a median of 75% clay, 13% silt, and 9% sand. Clay was greatest in the northwestern part and smallest in the areas near the major rivers entering or exiting the lake. Clay percentage and lake depth were strongly correlated. The mean organic matter content of bottom sediment was 16 g kg−1, total nitrogen 0.8 g kg−1, and Olsen available phosphorus 19 mg kg−1. Phosphorus concentrations peaked where water hyacinths were found in the northeastern part of the lake. This study will serve as a baseline for future water quality and sedimentation changes in Lake Tana. In particular, it might aid in explaining the spread of the water hyacinths.

Reviewing the impact of metals and PAHs on macroinvertebrates in urban watercourses

2002 ◽  
Vol 26 (2) ◽  
pp. 236-270 ◽  
Author(s):  
Gary Beasley ◽  
Pauline Kneale
Keyword(s):  
Water Quality ◽  
Stream Water ◽  
Ecological Integrity ◽  
Ecological Status ◽  
Field Measurements ◽  
Quality Parameters ◽  
Sediment Chemistry ◽  
Case Examples ◽  
Field Evidence ◽  
The Impact

Pollution-free stream water and sediments are crucial to support healthy stream flora and fauna, but urban surface runoff impairs water quality and leaves a legacy of pollution in the sediments. Pollution in sediments influences the development of macroinvertebrates, the lowest members of the food chain, leading to modification of the whole ecological structure. This review focuses on the sources and impacts of zinc, nickel, copper and oil derivative polycyclic aromatic hydrocarbon (PAH) contaminants on macroinvertebrates in urban streams. Land use, and the connectivity of the runoff and sediment are seen to have an effect on the ecological integrity of the watercourse but case examples are sparse. The literature indicates that while reduced species diversity has been identified at a number of sites the dynamics are neither well understood nor well modelled. The literature evidence is compared with field evidence from a study of 62 source areas in headwater catchments with residential, urban, industrial and motorway land uses. From the review and field results it is evident that there is still an important need for process-based field measurements of urban water quality parameters. It is suggested that forecasting the ecological status of watercourses would benefit from data on sediment chemistry and the interaction effects of metals and PAHs.

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