Occurrence, spatial distribution, and fate of polycyclic musks in sediments from the catchment of Chaohu Lake, China
5
Citation
46
Reference
10
Related Paper
Citation Trend
The basin model of total dissolved salt transformation in river water has been developed. It was tested in the Kirgizka River, the right tributary of the Tom River (Russia, Western Siberia, Tomsk). It was shown that the river system has the capacity of selfpurification and is characterized by rather stable salt composition. It is explained by the fact that the growth in dissolved salt concentration in river water is limited to some extent by, firstly, dilution of more mineralized groundwaters drained by rivers, and, secondly, relatively low solubility of some compounds.
Dilution
Cite
Citations (0)
Abstract This study was conducted to evaluate the factors controlling sediment and phosphorus export in a small agroforestry catchment located in NW Spain. At the catchment outlet discharge was continuously measured and suspended sediment (SS) and total (PT), particulate phosphorus (PP) and dissolved phosphorus (DP) were determined during seven rainfall events occurred in autumn. Sediment and sediment‐associated P export differed significantly between events. Particulate P was a greater portion of P transported in runoff. A large proportion of SS and PP exported from the catchment occurred from a relatively small portion of the catchment and during only two events. Rills and gullies delivered most of the eroded sediment directly to the stream, which contribute to high sediment and phosphorus exportation at the catchment outlet. Strong correlations between P and SS concentrations suggest that erosion processes are important in P fluxes. The highly significant correlation between SS and P concentrations in the stream enables to estimate transported P using SS in the Corbeira catchment. Copyright © 2009 John Wiley & Sons, Ltd.
Cite
Citations (27)
The study was performed for the needs of Danube river basin directorate in Bulgaria. The object of investigation is Yantra river basin situated in North Bulgaria. The Bulgarian Ministry of Environment and Water was provided the points for each effluent or water abstraction facility. For all points it was requested to evaluate 10% of multiannual average river discharge. For the drainage basin of Yantra river the points are 195. The selected cross section (points) are along the main river body and also on the main river tributaries. The majority of the points are located in the drainage basins of Vidima, Rositza, Belitza and Drianovska rivers. Three homogeneous regions were determined: upper mountain tributaries; middle part and lower part of Yantra river basin. Map with determined homogeneous regions for the drainage river basin is elaborated. The obtained results are discussed.
Discharge
Christian ministry
Cite
Citations (0)
Abstract Annual export of 11 major and trace solutes for the Yukon River is found to be accurately determined based on summing 42 tributary contributions. These findings provide the first published estimates of tributary specific distribution of solutes within the Yukon River basin. First, we show that annual discharge of the Yukon River can be computed by summing calculated annual discharges from 42 tributaries. Annual discharge for the tributaries is calculated from the basin area and average annual precipitation over that area using a previously published regional regression equation. Based on tributary inputs, we estimate an average annual discharge for the Yukon River of 210 km 3 year –1 . This value is within 1% of the average measured annual discharge at the U.S. Geological Survey gaging station near the river terminus at Pilot Station, AK, for water years 2001 through 2005. Next, annual loads for 11 solutes are determined by combining annual discharge with point measurements of solute concentrations in tributary river water. Based on the sum of solutes in tributary water, we find that the Yukon River discharges approximately 33 million metric tons of dissolved solids each year at Pilot Station. Discharged solutes are dominated by cations calcium and magnesium (5.65 × 10 9 and 1.42 × 10 9 g year –1 ) and anions bicarbonate and sulphate (17.3 × 10 9 and 5.40 × 10 9 g year –1 ). These loads compare well with loads calculated independently at the three continuous gaging stations along the Yukon River. These findings show how annual solute yields vary throughout a major subarctic river basin and that accurate estimates of total river export can be determined from calculated tributary contributions. Copyright © 2011. This article is a U.S. Government work and is in the public domain in the USA.
Discharge
Cite
Citations (6)
The Oguni River, which is one of the important tributaries of the Mogami River, starts from the western side of the Ou Mountain Range.As is often the case with the rivers near the copper mine, the waters of some tributaries in the left side are influenced by the mineral deposits in the catchment area. Such is not the case with the branches in the right side.So far as the main stream is concerned, the water quality undergoes a remarkable change after joined by the waters issuing from the hot springs in the drainage basin. According to the observations at the fixed station, there exists a linear relationship (positive correlation) between the contents of SO42- and Cl-. Generally speaking, the increase of the water level tends to decrease the concentrations of the chemical constituents. In the case of melt water, the circumstances are different from this.
Copper mine
Mountain range (options)
Main river
Cite
Citations (0)
Cite
Citations (6)
The results of water analysis for 10 stations in the main Naktong and 11 stations in the tributaries from March to December 1968 are as follows: The water quality of the Naktong River Basin is generally the frist class of water, especially the tributaries, Hwang river, Nam river, Milyang river, Naesongchun, Hoechun, Wichun and Panbyunchun were dissolved in less than 100 mg/l as the amount of the total ion of the main component. In comparison with river discharge, the amount of the total ion of the main component is decreased in June and July, because of the river discharge is increased in those periods. According to the measurement of the conductivity and the hardness, the better water quality is distinguished by the following order: lower part of river (Namji), middle part of river (Waegwan), upper part of river (Yean). The conductivity of Kumho river, Tongchon is higher than the middle part of the main river and Nam river, Chongam is smaller than lower part of the main rivller. The variation of the amount of the total ion of main component in the basin is mainly effected by . The relationship between mg/l .The main river was much contaminated by Kumho river and C.O.D. at Gang-chung, Kumho river in June was recorder over the standard about 7 times.
Main river
Discharge
Water discharge
Cite
Citations (0)
The properties of rivers and their catchments can be expressed by statistical relationships between geomorphic parameters. These statistical relationships may reveal some inherent differences in geomorphic evolution for different reaches or different order tributaries of a river basin. A case study was undertaken of the Yunnan reach of the Langcangjiang River. The catchment area, channel length and gradient of the first-, second-and third-order tributaries all with catchment areas larger than 100 km 2 in the Yunnan reach were the main geomorphic parameters evaluated. The correlation between catchment area and channel length as well as between catchment area and channel gradient with respect to the total tributaries, different reach tributaries, and different order tributaries were revealed using statistical methods. In general, the channel length as a function of catchment area, was best expressed by a quadratic function where channel length increases with increasing catchment area (half parabola), while the channel gradient as a function of catchment area is best expressed by an exponential decay function. Comparison of the best-fit formulas revealed the following phenomena: the lower Yunnan reach tributaries and the first-order tributaries have a dominant effect on geomorphic parameters of the total tributaries. In addition, the statistical relationships indicate that the river geomorphic system in the upper and lower Yunnan reaches evolved differently. This study method used to differentiate river characteristics by determining statistical relationships between geomorphic parameters may be extended to other rivers and their catchments.
Catchment area
Statistical Analysis
Cite
Citations (1)
Abstract On the Crimean Peninsula territory, there are 1657 permanent and temporary watercourses with a total length of 5996 km, their length, catchment areas and water volumes are small. Most (92.1%) are watercourses less than 10 km long. Particular attention is paid to the Chernaya river basin, supplying the Chernorechensk reservoir - one of the largest in the region and providing water to the city of Sevastopol Explored for the first time in the complex of the r. Chernaya and all tributaries -the r. Uzundzha, the R. Bosa, the R. Baga Nizhnyaya, the R. Baga Verchniaya, the R. Urkusta, the R. Ay-Todorka, Sukhaya rivers, the R. Bajdarka, the R. Uppa, the R. Armanka, the r. Calenda. The article presents calculated data on the Chernaya river annual run-off availability and all its tributaries It was revealed that the annual run-off statistical characteristics adopted for the water stations adequately reflect the current situation in the long-term section with the river run-off of the Chernaya River and the Chernorechensk reservoir catchment area.
Peninsula
Catchment area
Cite
Citations (0)