Surface water inflow reduction at the underground Neves-Corvo mine, Portugal

1993 ◽  
Vol 12 (1) ◽  
pp. 11-20
Author(s):  
R. Fernandez Rubio ◽  
P. Carvalho
Keyword(s):  
Surface Water ◽  
Water Inflow

Peculiarities of Long-term Variability of Surface Water Inflow to Lake Baikal

2019 ◽  
Vol 44 (10) ◽  
pp. 652-658
Author(s):  
V. N. Sinyukovich ◽  
M. S. Chernyshov
Keyword(s):  
Surface Water ◽  
Lake Baikal ◽  
Water Inflow

Groundwater infiltration, surface water inflow and sewerage exfiltration considering hydrodynamic conditions in sewer systems

2011 ◽  
Vol 63 (9) ◽  
pp. 1841-1848 ◽  
Author(s):  
Christian Karpf ◽  
Stefan Hoeft ◽  
Claudia Scheffer ◽  
Lothar Fuchs ◽  
Peter Krebs
Keyword(s):  
Surface Water ◽  
High Sensitivity ◽  
Water Levels ◽  
Water Inflow ◽  
Network Modelling ◽  
Infiltration Rates ◽  
Sewer Systems ◽  
The City ◽  
Groundwater Infiltration ◽  
Modelling Approach

Sewer systems are closely interlinked with groundwater and surface water. Due to leaks and regular openings in the sewer system (e.g. combined sewer overflow structures with sometimes reverse pressure conditions), groundwater infiltration and surface water inflow as well as exfiltration of sewage take place and cannot be avoided. In the paper a new hydrodynamic sewer network modelling approach will be presented, which includes – besides precipitation – hydrographs of groundwater and surface water as essential boundary conditions. The concept of the modelling approach and the models to describe the infiltration, inflow and exfiltration fluxes are described. The model application to the sewerage system of the City of Dresden during a flood event with complex conditions shows that the processes of infiltration, exfiltration and surface water inflows can be described with a higher reliability and accuracy, showing that surface water inflow causes a pronounced system reaction. Further, according to the simulation results, a high sensitivity of exfiltration rates on the in-sewer water levels and a relatively low influence of the dynamic conditions on the infiltration rates were found.

PREVENTION OF SURFACE WATER INFLOW FROM THE TERRITORY OF AREA AND POINT SOURCES OF POLLUTION

2021 ◽  
pp. 37-43
Author(s):  
N. M. MAKAROVA ◽  
◽  
A. F. ROGACHEV
Keyword(s):  
Surface Water ◽  
Optimal Solution ◽  
Point Sources ◽  
Water Inflow ◽  
Sources Of Pollution

The aim of the study is to fi nd the optimal solution to prevent the fl ow of surface water from the territory of various sources of pollution and protect the soil from erosion.

scholarly journals A basin-scale approach for assessing water resources in a semiarid environment: San Diego region, California and Mexico

2012 ◽  
Vol 16 (10) ◽  
pp. 3817-3833 ◽  
Author(s):  
L. E. Flint ◽  
A. L. Flint ◽  
B. J. Stolp ◽  
W. R. Danskin
Keyword(s):  
Surface Water ◽  
Water Balance ◽  
River Basin ◽  
San Diego ◽  
Water Inflow ◽  
Balance Model ◽  
Total Water ◽  
Characterization Model ◽  
Basin Characterization Model ◽  
Groundwater Outflow

Abstract. Many basins throughout the world have sparse hydrologic and geologic data, but have increasing demands for water and a commensurate need for integrated understanding of surface and groundwater resources. This paper demonstrates a methodology for using a distributed parameter water-balance model, gaged surface-water flow, and a reconnaissance-level groundwater flow model to develop a first-order water balance. Flow amounts are rounded to the nearest 5 million cubic meters per year. The San Diego River basin is 1 of 5 major drainage basins that drain to the San Diego coastal plain, the source of public water supply for the San Diego area. The distributed parameter water-balance model (Basin Characterization Model) was run at a monthly timestep for 1940–2009 to determine a median annual total water inflow of 120 million cubic meters per year for the San Diego region. The model was also run specifically for the San Diego River basin for 1982–2009 to provide constraints to model calibration and to evaluate the proportion of inflow that becomes groundwater discharge, resulting in a median annual total water inflow of 50 million cubic meters per year. On the basis of flow records for the San Diego River at Fashion Valley (US Geological Survey gaging station 11023000), when corrected for upper basin reservoir storage and imported water, the total is 30 million cubic meters per year. The difference between these two flow quantities defines the annual groundwater outflow from the San Diego River basin at 20 million cubic meters per year. These three flow components constitute a first-order water budget estimate for the San Diego River basin. The ratio of surface-water outflow and groundwater outflow to total water inflow are 0.6 and 0.4, respectively. Using total water inflow determined using the Basin Characterization Model for the entire San Diego region and the 0.4 partitioning factor, groundwater outflow from the San Diego region, through the coastal plain aquifer to the Pacific Ocean, is calculated to be approximately 50 million cubic meters per year. The area-scale assessment of water resources highlights several hydrologic features of the San Diego region. Groundwater recharge is episodic; the Basin Characterization Model output shows that 90 percent of simulated recharge occurred during 3 percent of the 1982–2009 period. The groundwater aquifer may also be quite permeable. A reconnaissance-level groundwater flow model for the San Diego River basin was used to check the water budget estimates, and the basic interaction of the surface-water and groundwater system, and the flow values, were found to be reasonable. Horizontal hydraulic conductivity values of the volcanic and metavolcanic bedrock in San Diego region range from 1 to 10 m per day. Overall, results establish an initial hydrologic assessment formulated on the basis of sparse hydrologic data. The described flow variability, extrapolation, and unique characteristics represent a realistic view of current (2012) hydrologic understanding for the San Diego region.

scholarly journals High terrestrial carbon load via groundwater to a boreal lake dominated by surface water inflow

2017 ◽  
Vol 122 (1) ◽  
pp. 15-29 ◽  
Author(s):  
Karolina Einarsdottir ◽  
Marcus B. Wallin ◽  
Sebastian Sobek
Keyword(s):  
Surface Water ◽  
Water Inflow ◽  
Terrestrial Carbon ◽  
Boreal Lake ◽  
Carbon Load

scholarly journals Water Resource Management through Understanding of the Water Balance Components: A Case Study of a Sub-Alpine Shallow Lake

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3124
Author(s):  
Marzia Ciampittiello ◽  
Claudia Dresti ◽  
Helmi Saidi
Keyword(s):  
Resource Management ◽  
Surface Water ◽  
Water Balance ◽  
Water Resource ◽  
Water Resource Management ◽  
Water Inflow ◽  
Water Balance Components ◽  
Hydrological Balance ◽  
Volume Variation ◽  
Groundwater Source

Water availability is a crucial factor for the hydrological balance of sub-alpine shallow lakes and for their ecosystems. This is the first study on water balance and water management of Lake Candia, a small sub-alpine, shallow morainic lake. The aims of this paper are to better understand the link between surface water and groundwater. The analyses carried out included: (i) evaluation of water balance, (ii) identification of trends for each component of water balance, (iii) detection of the presence of a break point or change in the behavior of each component, and (iv) regression analyses of the terms of hydrological balance and their relative importance. The analyses revealed a high variability mainly regarding the groundwater component, and very good correlation between rainfall and volume variation, between rainfall and the water inflow, and between groundwater source and outflow. Volume variation is linked with rainfall, outflow, groundwater source, and surface water inflow. Despite the fact that the groundwater component does not seem to have a great importance relative to direct rainfall on the lake, it is necessary to study the component with careful resource management policies that point toward the protection of the water resource, sustainable uses, and protection of the Lake Candia ecosystem.

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