Observing the evolutionary process of the Jinsha River water system from the longitudinal profile morphology

2015 ◽  
pp. 609-612
Keyword(s):  
River Water ◽  
Water System ◽  
Evolutionary Process ◽  
Longitudinal Profile ◽  
Jinsha River

scholarly journals Intra- and Inter-Annual Variability of Hydrometeorological Variables in the Jinsha River Basin, Southwest China

2019 ◽  
Vol 11 (19) ◽  
pp. 5142 ◽  
Author(s):  
Tian Peng ◽  
Chu Zhang ◽  
Jianzhong Zhou
Keyword(s):  
River Basin ◽  
Moving Average ◽  
Water System ◽  
Major Elements ◽  
Trend Detection ◽  
Jinsha River ◽  
Sen’S Slope ◽  
Annual Variability ◽  
Mk Test ◽  
Slope Estimation

In this study, the intra- and inter-annual variability of three major elements in the water system, temperature, precipitation and streamflow, from 1974 to 2010 in the Jinsha River Basin, China, were analyzed. An exploratory data analysis method, namely, moving average over shifting horizon (MASH), was introduced and combined with the Mann–Kendall (MK) test and Sen’s slope estimation to analyze the intra- and inter-annual variations. The combination of MASH with the MK test and Sen’s slope estimation demonstrated that the annual temperature, precipitation and streamflow from 1974 to 2010 showed, on average, an increasing trend. The highest change in temperature was detected in early January, 0.8 ℃, that of precipitation was detected in late June, 0.4 mm/day, and that of streamflow was detected mid-August, 138 mm/day. Sensitivity analysis of the smoothing parameters on estimated trends demonstrated that Y parameters smaller than 2 and w parameters smaller than 6 were not suitable for trend detection when applying the MASH method. The correlation between the smoothed data was generally greater than that between the original hydrometeorological data, which demonstrated that the application of MASH could eliminate the influence of periodicity and random fluctuations on hydrometeorological time series and could facilitate regularity and the detection of trends.

Interactions Between Biotic and Abiotic Factors and Viruses in a Water System

1985 ◽  
Vol 17 (10) ◽  
pp. 139-151 ◽  
Author(s):  
R. Walter ◽  
J. Dürkop ◽  
B. Friedman ◽  
H. J. Dobberkau
Keyword(s):  
River Water ◽  
Hepatitis A ◽  
Potable Water ◽  
Abiotic Factors ◽  
Water System ◽  
Industrial Effluents ◽  
Virus Content ◽  
Sampling Points ◽  
Distributed Sampling

A river intensively used along its entire course for extracting potable water and for discharging domestic and industrial effluents permanently carries a high load of viruses, including hepatitis A and rotaviruses. In the areas supplied with potable water from this river hepatitis A is endemic. The river has been investigated four times at 16 or more sampling points throughout its course in the years 1981, 1982 and 1983. Coincident with the virological investigation, biological, microbiological and chemical examinations were conducted with the same water sample. At some representatively distributed sampling points along the river course, tests for heavy metals (Cd, Ni, Cu, Cr, Pb) and selected chemical compounds were also performed. The virological quality of the river water largely depends on the virus input via domestic sewage. Statistically significant correlations have been found between virus level, pH, NH4+ and NO3−. Amoebae species are likely to counteract viruses. Knowing the dynamics of river water exploitation above the extraction sites, a model for the estimation of virus content in the raw water could be developed.

scholarly journals Change of the Moscow River Water System Morphometric Parameters during the Period of their Operation

2014 ◽  
pp. 4-22
Author(s):  
Keyword(s):  
River Water ◽  
Water System ◽  
Morphometric Parameters ◽  
Water Bodies ◽  
Water Volumes ◽  
Moscow River

The main results of the fi rst-conducted instrumental bathimetric surveys of the Moscow River Water System reservoirs are presented; changes of the morthometric parameters in comparison with the designed ones are shown. Assessment of the water bodies’ silting intensity by changes of water volumes in individual layers during the period of their exploitation has been carried out.

scholarly journals Persepsi Masyarakat Terhadap Ekosistem Daerah Aliran Sungai Ayung Menuju Sumberdaya Air Berkelanjutan

2016 ◽  
Vol 16 (2) ◽  
pp. 78
Author(s):  
I Made Sudarma ◽  
Wayan Widyantara
Keyword(s):  
Water Resources ◽  
River Water ◽  
Water Conservation ◽  
Public Perception ◽  
Water System ◽  
Ecosystem Functions ◽  
Conservation Action ◽  
Water Users ◽  
The Government ◽  
And Behavior

The sustainability of watershed ecosystem functions in managing the water system can be achieved if the utilization pattern of their territories in accordance with the rules of conservation. A decrease in quantity and quality of the river water can be an indicator that condition of the watershed have been damaged. The destruction of the watershed ecosystem as a result of various causes will be able to threaten supply of sustainable water resources. The aim of this research is to determine and analyze the perceptions and behavior of upstream communities and governments about the function and role of water conservation and watershed in their behavior in the preservation of the watershed and its relationship with the current condition of the Ayung river. The study was conducted in the area upstream of Ayung river, which is in the Belok Sidan and Plaga Village, Petang, Badung, stake holder water users Ayung River such as PDAM, AMDK, rafting and farmers, as well as the government of Badung Regency that responsible for the management and conservation of Ayung River. Results of the study found that the public perception of the functions and benefits of watershed in the conservation of water resources classified in the category of high, but was followed by actions or attitudes in the medium category. There was no real relationship between perception and action, but the action affect current watershed conditions. The role and participation of stakeholders Ayung River water users were still relatively low in the preservation of the watershed, while the government's role classified as medium has not been done in an integrated among sectors and regions. From the results of this study it is recommended that the preservation of the Ayung river through various conservation action were integrated by involving communities upstream more active through the empowerment of local knowledge and improve their welfare. Government plays an important role in moving towards unity of this act.

Analysis of pollution levels of 16 antibiotics in the river water of Daliao River water system

2013 ◽  
Vol 30 (8) ◽  
pp. 756-762 ◽  
Author(s):  
Changqing YANG ◽  
Longxing WANG ◽  
Xiaohong HOU ◽  
Jiping CHEN
Keyword(s):  
River Water ◽  
Water System ◽  
Pollution Levels

Catchment scale estimation of current and future water balance in the Chernobyl Exclusion Zone in Ukraine

2020 ◽  
Author(s):  
Yasunori Igarashi ◽  
Mark Zheleznyak ◽  
Hlib Lisovyi ◽  
Yoshifumi Wakiyama ◽  
Yuichi Onda ◽  
...  
Keyword(s):  
Water Balance ◽  
River Water ◽  
Water System ◽  
Future Trend ◽  
Exclusion Zone ◽  
Catchment Scale ◽  
Runoff Water ◽  
Discharge Data ◽  
Climate Conditions ◽  
The Future

<p>Changes in the catchment scale water balance have important social implications for usable water now and in the future. Stream discharge is also directly related to radionuclides flux in the river water system. The aim of this study was to clarify the water balance in the Chernobyl Exclusion Zone (CEZ) under current and future climate conditions. A catchment scale hydrological model was used with long-term discharge data to project the future trend of radionuclides wash-off from the contaminated catchment at the CEZ in Ukraine. The Sakhan river catchment in the CEZ (51.41°N, 30.00°E) in Ukraine is one of the Pripyat river systems, and has a total surface area of 186.9 km<sup>2</sup>. We found that under the current climate, 84% of annual input (sum of rainfall and snowmelt) was consumed as evapotranspiration, and discharge was estimated to be 16%. In future climates, annual precipitation is expected to increase. However, a projected increase in the vapor pressure deficit led the consumption of precipitation as evapotranspiration and no significant increase in discharge. The study found that warmer winter and spring temperatures will decrease the snowfall, and increase the rainfall, but it was not enough to increase evapotranspiration. As a result, the peak of discharge shifted from April to March. The increase of future average discharge during the winter and spring came from a combination of (1) increasing rainfall in the winter and spring, and (2) relatively small levels of evapotranspiration, which enhanced the catchment scale water recharge in soil moisture and gave rise to greater discharge during winter and spring. The reduction of extreme river discharge from the hydrological projections could reduce the probability of high radionuclides concentration in the river water system in the future, owing to the reduction of surface runoff water from the contaminated surface soil and/or top layer of floodplain soils in the CEZ.</p>

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