EFFECT OF HETEROGENEITY OF RIVERBED ON GROUNDWATER DISCHARGE IN SMALL RIVER BASIN UNDER NATURAL AND STRESSED CONDITIONS

2018 ◽  
pp. 90-99 ◽  
Author(s):  
N. N. Muromets ◽  
V. N. Samartsev ◽  
A. A. Khakimova ◽  
P. Y. Vasilesvky
Keyword(s):  
River Basin ◽  
Catchment Area ◽  
River Flow ◽  
Groundwater Discharge ◽  
Regional Model ◽  
Small River ◽  
Reliable Prediction ◽  
River Catchment ◽  
Flow Reduction ◽  
Small River Basin

A regional model of catchment of small river (catchment area is about1000 km2) is discussed. Model was developed to evaluate possible influence of hypothetical groundwater intake on river flow. The model was calibrated to measured groundwater heads and river flows. Geophysical and hydrometric survey allowed to characterize a heterogeneity of riverbed along the channel. River flow reduction, calculated on model with riverbed heterogeneity is greater by 25% compared to that calculated without heterogeneity. Thus it is shown that accounting for riverbed heterogeneity is advisable for more reliable prediction of impact of water intakes on environment.

scholarly journals GEOLOGICAL-TECTONICAL STRUCTURE AND HIDROGEOLOGICAL CHARACTERISTICS OF THE STUPČANICA RIVER CATCHMENT AREA

2015 ◽  
Vol 36 ◽  
pp. 135-144
Keyword(s):  
River Basin ◽  
Catchment Area ◽  
Geological Structure ◽  
Significant Part ◽  
Source Zone ◽  
Surface Flows ◽  
River Catchment ◽  
Hydrogeological Characteristics ◽  
The Right

The Stupčanica River catchment area belongs to the Bosnia River Basin. It is situated in the central part of the Bosnian Mountains. The catchment area covers 283 km/2 .The Stupčanica River originates when two waterflows Bijesnica and Pištica meet each other upstream from the Pjenovac settlement. In its further flow, from the right side this river receives several larger and smaller streams, of which excelled are Varošnica, Bjelava and Grabovica, and from the left side Dobrovački potok, Čađavica, Studenac, Duboki potok and Jablanica. Numerous sources and springs (permanent and temporary) with significantly less abundance are situated on both valley sides of the Stupčanica, all until the source zone. Beside permanent surface flows, there are temporary ones as well, which existence is conditioned by water plunging into the ground or springs' drying. It has been performed in this paper the analysis of geological-tectonical structure as well as hydrogeological characteristics of the Stupčanica catchment area, from its source and down to Olovo, where together with Bioštica River it makes the River Krivaja Basin. The border of the basin-watershed with its significant part is underground-hydrogeological, very often with zonal character. The watershed has been determined on the base of analyse on geological structure and geomorphological relations as well as examinations on underground relations.

scholarly journals Evaluation of catchment connectivity and storm runoff in flat terrain subject to urbanisation

2009 ◽  
Vol 6 (5) ◽  
pp. 6721-6758 ◽  
Author(s):  
O. V. Barron ◽  
D. W. Pollock ◽  
W. R. Dawes
Keyword(s):  
Land Use ◽  
Spatial Analysis ◽  
Catchment Area ◽  
River Flow ◽  
Hydrological Connectivity ◽  
Rainfall Runoff ◽  
Rainfall Events ◽  
River Catchment ◽  
Analysis Technique ◽  
The Impact

Abstract. Contributing Catchment Area Analysis (CCAA) is a spatial analysis technique that allows estimation of the hydrological connectivity of relatively flat catchments and the effect of relief depressions on the catchment rainfall-runoff relationship for individual rainfall events. CCAA of the Southern River catchment, Western Australia, showed that catchment contributing area varied from less than 20% to more than 60% of total catchment area for various rainfall events. Such variability was attributed to a compensating effect of relief depressions. CCAA was further applied to analyse the impact of urbanisation on the catchment rainfall-runoff relationship. It was demonstrated that the change in land use resulted in much greater catchment volumetric runoff than expected simply as a result of the increase in proportion of impervious urban surfaces. As urbanisation leads to an increase in catchment hydrological connectivity, the catchment contributing area to the river flow also becomes greater. This effect was more evident for the most frequent rainfall events, when an increase in contributing area was responsible for a 30–100% increase in total volumetric runoff. The impact of urbanisation was greatest in sandy catchments, which were largely disconnected in the pre-development conditions.

scholarly journals Groundwater chemistry: a case study of the Mesta River Basin

2021 ◽  
Vol 50 (2) ◽  
pp. 35-46
Author(s):  
Tanya Vasileva ◽  
Dimitar Sholev
Keyword(s):  
Chemical Composition ◽  
River Basin ◽  
Calcium Ions ◽  
Catchment Area ◽  
Sodium Ions ◽  
River Catchment ◽  
Bicarbonate Ions ◽  
Calcium Bicarbonate ◽  
Water Ph

The present study describes the hydrochemistry of ground waters found in the Mesta River Basin, located in the south-western part of Bulgaria. The groundwater’s composition can be expressed as follows: Ca2+ > Na+ > Mg2+ > K+; Ca2+ > Mg2+ > Na+ > K+ in equivalent units for the cations, and HCO3– > SO42– > Cl– in equivalent units for the anions. The chemical composition of the studied groundwater can be described as calcium-bicarbonate. The calcium ions make up from 17.90% to 38.62% (30.18% on average), and the bicarbonate ions make up from 35.30% to 48.98% (43.70% on average) of all ions. Taken together, the calcium and bicarbonate ions make up from 61.44% to 87.60% (73.88% on average) of all ions. The groundwater itself is of slightly alkaline nature, having pH of 7.3 to 8.6, and TDS of 67 mg/l to 611 mg/l. One groundwater sample from the Mesta River catchment area was found to be of the low-mineralized type (TDS = 193 mg/l) alkaline water (pH = 9.8) in the Mesta Lowlands – the Banichan groundwater mineral source. The water can be described as sodium-bicarbonate, with sodium ions making up to 93.5% of the cations, and bicarbonate ions – 69.6% of the anions. Out of all ions, the sodium ions were found to be 48%, and the bicarbonate ions – 33.86%. The sequence of ions is in the following order: Na+ > Ca2+ > Mg2+ > K+, and HCO3– > Cl– > SO42– > CO32–.

scholarly journals ENSEMBLE FORCASTING OF RAINFALL AND FLOOD IN A SMALL RIVER BASIN

2013 ◽  
Vol 69 (4) ◽  
pp. I_1597-I_1602 ◽  
Author(s):  
Kenichiro KOBAYASHI ◽  
Shigenori OTSUKA ◽  
Kaoru TAKARA ◽  
Seiji ORIGUCHI ◽  
Kazuo SAITO
Keyword(s):  
River Basin ◽  
Small River ◽  
Small River Basin
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