scholarly journals ON THE NON-LINEARITY OF SUB-SURFACE AND GROUNDWATER-RUNOFF

1979 ◽  
Vol 1979 (283) ◽  
pp. 45-55 ◽  
Author(s):  
Fusetsu TAKAGI ◽  
Uichiro MATSUBAYASHI
Keyword(s):  
Groundwater Runoff ◽  
Surface And Groundwater

scholarly journals Hydrological Regime of the River When Changing the Landscape Structure of the Catchment Area (by the Example of the River Goloustnaya)

2021 ◽  
Vol 37 ◽  
pp. 17-27
Author(s):  
O. V. Gagarinova ◽  
◽  
D. E. Razdobarin ◽  
Keyword(s):  
21St Century ◽  
Landscape Structure ◽  
Catchment Area ◽  
Forest Cover ◽  
Water Discharge ◽  
Atmospheric Precipitation ◽  
Hydrological Regime ◽  
Global Changes ◽  
Groundwater Runoff ◽  
Surface And Groundwater

The main features of the hydrological regime of the river are strategic regional characteristics. At the same time, a significant effect on surface and groundwater runoff, evaporation and transpiration determines the landscape of the transformation of atmospheric precipitation entering the drainage area, surface and groundwater runoff. The existing basin landscape structure has hydrological properties that change when structural components are disturbed. The article examines the relationship between the intra-annual regime of the river and changes in the landscape structure of the catchment area over ten years. An estimate of the size of landscape transformations is proposed based on data on global changes in forest cover in the world in the 21st century – high-resolution global maps of changes in forest cover in the 21st century. The analysis of the dynamics of characteristics of runoff, precipitation and area landscapes is carried out. The dependence of the hydrological regime of the river on the structural transformations of the drainage landscape was revealed for the phase of the upper rainfall runoff. An increase in water discharge in the river against the background of total precipitation was noted, which indicates a change in the landscape-hydrological properties of the catchment. As a result of the reduction in the areas of dark coniferous landscapes, which have significant runoff- regulating functions of the territory of the hydrological regime, the values and amplitudes of the rises of rain floods increase. Investigations of landscape-hydrological transformations of watersheds is an important direction in optimizing the use of natural resources in watersheds and minimizing the negative impact of natural waters.

Ecological and hygienic assessment pollution of surface and groundwater in Transural Region Republic of Bashkortostan

2017 ◽  
pp. 14-17
Author(s):  
Z.B. Baktybaeva ◽  
R.A. Suleymanov ◽  
T.K. Valeev ◽  
N.R. Rakhmatullin
Keyword(s):  
Surface Water ◽  
Calcium Nitrate ◽  
Water Bodies ◽  
Drinking Water Contamination ◽  
Mining Areas ◽  
Relative Contribution ◽  
Quality Of Water ◽  
Republic Of Bashkortostan ◽  
The Republic ◽  
Surface And Groundwater

Carried out ecological and hygienic assessment of pollution of surface and groundwater of mining areas in the Republic of Bashkortostan. Revealed exceeding standards for fishery water bodies and drinking and cultural and community water use, which indicates the potential danger of surface water for the health of the region's population. The greatest relative contribution to the overall pollution of surface water bodies are making manganese (33,0–66,6 %), iron (9,1–15,6 %), calcium (6,5–11,7 %), lead (5,8– 7,2 %). The quality of water used for drinking purposes from decentralized water sources (boreholes, wells, springs), do not always correspond to the hygienic and sanitary-epidemiological requirements. In this case, the highest priority performance of drinking water contamination are increased stiffness, high content of iron, calcium, nitrate, presence cadmium, and hexavalent chromium.

Pesticide Contamination of Groundwater in Virginia: BMP Impact Assessment

1993 ◽  
Vol 28 (3-5) ◽  
pp. 379-387 ◽  
Author(s):  
S. Mostaghimi ◽  
P. W. McClellan ◽  
R. A. Cooke
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Best Management Practices ◽  
Water Samples ◽  
Management Practices ◽  
Water Quality Monitoring ◽  
Pesticide Contamination ◽  
Cropping Patterns ◽  
Creek Watershed ◽  
Surface And Groundwater

The Nomini Creek Watershed/Water Quality monitoring project was initiated in 1985, as part of the Chesapeake Bay Agreement of 1983, to quantify the impacts of agricultural best management practices (BMPs) on improving water quality. The watershed monitoring system was designed to provide a comprehensive assessment of the quality of surface and groundwater as influenced by changes in land use, agronomic, and cultural practices in the watershed over the duration of the project. The primary chemical characteristics monitored include both soluble and sediment-bound nutrients and pesticides in surface and groundwater. Water samples from 8 monitoring wells located in agricultural areas in the watershed were analyzed for 22 pesticides. A total of 20 pesticides have been detected in water samples collected. Atrazine is the most frequently detected pesticide. Detected concentrations of atrazine ranged from 0.03 - 25.56 ppb and occurred in about 26 percent of the samples. Other pesticides were detected at frequencies ranging from 1.6 to 14.2 percent of all samples collected and concentrations between 0.01 and 41.89 ppb. The observed concentrations and spatial distributions of pesticide contamination of groundwater are compared to land use and cropping patterns. Results indicate that BMPs are quite effective in reducing pesticide concentrations in groundwater.

Influence of sorption parameters on cesium-137 removal using modified activated carbon obtained from corchorus olitorius stalks

2020 ◽  
Vol 108 (10) ◽  
pp. 799-808
Author(s):  
Mostafa M. Hamed ◽  
Mahmoud M. S. Ali ◽  
Aly A. Helal
Keyword(s):  
Natural Waters ◽  
Low Cost ◽  
Radioactive Cesium ◽  
Corchorus Olitorius ◽  
Fukushima Accident ◽  
Modified Activated Carbon ◽  
Cesium Ions ◽  
Cesium 137 ◽  
Sorption Parameters ◽  
Surface And Groundwater

AbstractRemoval of 137Cs radionuclides from the environment has engrossed the concern of researchers after Fukushima accident. The leakage of radioactive cesium ions can lead up to surface and groundwater contamination, and this leads to pollution of drinking water sources. In this work, corchorus olitorius stalks has been used as a novel precursor for production of low-cost mesoporous activated carbon (Meso-AC) and HNO3/H2O2-modified Meso-AC (m-Meso-AC). The physicochemical properties of all adsorbents were evaluated. The influences of sorption parameters and presence of some ligands (humic acid, fulvic acid, and EDTA) on the sorption of 137Cs were studied. The maximum 137Cs capacity of m-Meso-AC was found to be 58.74 mg/g. Efficiency of the new adsorbent to remove 137Cs radionuclides from natural waters (tap, river, and groundwater) was investigated. The studies showed that new adsorbent could be used as promising material for the retention of 137Cs from real radioactive waste and natural water samples.

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