scholarly journals The Impact of Heavy Rainfall in the Hydrological Regime of Suha River Basin in 2006

2014 ◽  
Vol 8 (2) ◽  
pp. 21-31
Author(s):  
◽  
Alina Tirnovan ◽  
Gheorghe Romanescu ◽  
Gianina Maria Cojoc
Keyword(s):  
River Basin ◽  
Hydrological Regime ◽  
Intergovernmental Panel ◽  
Recent Climate ◽  
Basin Water ◽  
Water Administration ◽  
Hydrometric Station ◽  
Short Time ◽  
The Impact ◽  
Very High

Abstract Recent climate changes mentioned in the Intergovernmental Panel for Climate Change (IPCC, 2013) report highlight the fact that in the past 50 years at the planetary level have occurred major changes in all climate components. In this regard the analysis of rainfall oscillations and of their impact on the hydric regime is particularly important, being witnessed in the surface and groundwater level variations. In the Suha River Basin, the year 2006 has been characterized by large rainfall quantities that have been generated, in particular, in June by persistent retrograde cyclonic activity (223 mm at Slătioara 3 hydrometric station, 269.1 mm at Gemenea 5 station, 271.6 mm at Valea lui Ion station and 351.8 mm at Stulpicani). On the main course of Suha, but especially on its tributaries (Gemenea and Slătioara) have been recorded very high flow rates (5% and 2% insurance) caused by the amounts of rainfall felt in a short time. To estimate the impact of rainfall on the Suha basin hydrological regime we used data collected by the Siret Basin Water Administration-Bacau, being analyzed the rainfall quantities, duration, intensity, tendency and effects.

Application of SWAT Model in Assessing the Influence of Herbage Covering to Runoff Formation Process in Ma River Basin

2014 ◽  
Vol 955-959 ◽  
pp. 3065-3070
Author(s):  
Tuan Bui Anh ◽  
Shi Hua He ◽  
Lan Vu Thi Thu ◽  
Jian Jun Zhu
Keyword(s):  
River Basin ◽  
Formation Process ◽  
Input Data ◽  
Swat Model ◽  
Weather Data ◽  
Runoff Formation ◽  
Gis Technique ◽  
Forest Coverage ◽  
Basin Water ◽  
The Impact

The SWAT model and GIS technique were applied to calculate the runoff in the Ma River basin, Vietnam. The study focused on assessing the influence of herbage coverage to runoff formation process. In this integration, GIS supplies SWAT input data included elevation, soil properties, land use and weather data and creates graphical user interface, while SWAT operates input data, delineates watershed, simulates different physical processes, displays output data as runoff. Based on the model testing and parameter calibrating, two scenarios of decreasing and increasing 30% of forest coverage are built to assess the impact to runoff changing. The results have important guiding significance for the planning, management and sustainable utilization of river basin water resources.

scholarly journals Climate Change Effects on Hydropower Potential in the Alcantara River Basin in Sicily (Italy)

2013 ◽  
Vol 17 (19) ◽  
pp. 1-22 ◽  
Author(s):  
G. T. Aronica ◽  
B. Bonaccorso
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Coupled Model ◽  
Daily Rainfall ◽  
Hydrological Regime ◽  
Future Climate Change ◽  
Hydropower Generation ◽  
Energy Potential ◽  
Hydropower Potential ◽  
The Impact

Abstract In recent years, increasing attention has been paid to hydropower generation, since it is a renewable, efficient, and reliable source of energy, as well as an effective tool to reduce the atmospheric concentrations of greenhouse gases resulting from human activities. At the same time, however, hydropower is among the most vulnerable industries to global warming, because water resources are closely linked to climate changes. Indeed, the effects of climate change on water availability are expected to affect hydropower generation with special reference to southern countries, which are supposed to face dryer conditions in the next decades. The aim of this paper is to qualitatively assess the impact of future climate change on the hydrological regime of the Alcantara River basin, eastern Sicily (Italy), based on Monte Carlo simulations. Synthetic series of daily rainfall and temperature are generated, based on observed data, through a first-order Markov chain and an autoregressive moving average (ARMA) model, respectively, for the current scenario and two future scenarios at 2025. In particular, relative changes in the monthly mean and standard deviation values of daily rainfall and temperature at 2025, predicted by the Hadley Centre Coupled Model, version 3 (HadCM3) for A2 and B2 greenhouse gas emissions scenarios, are adopted to generate future values of precipitation and temperature. Synthetic series for the two climatic scenarios are then introduced as input into the Identification of Unit Hydrographs and Component Flows from Rainfall, Evapotranspiration and Streamflow Data (IHACRES) model to simulate the hydrological response of the basin. The effects of climate change are investigated by analyzing potential modification of the resulting flow duration curves and utilization curves, which allow a site's energy potential for the design of run-of-river hydropower plants to be estimated.

scholarly journals How Inter-Basin Transfer of Water Alters Basin Water Stress Used for Water Footprint Characterization

Environments ◽  
2018 ◽  
Vol 5 (9) ◽  
pp. 105
Author(s):  
Shinjiro Yano ◽  
Toshio Okazumi ◽  
Yoshihisa Iwasaki ◽  
Masahiro Yamaguchi ◽  
Kenichi Nakamura ◽  
...  
Keyword(s):  
River Basin ◽  
Water Footprint ◽  
Water Cycle ◽  
Characterization Factors ◽  
Major River ◽  
Basin Water ◽  
Global Estimates ◽  
Local Water ◽  
Definition Of ◽  
The Impact

Water footprint assessments contribute to a better understanding of potential environmental impacts related to water and have become essential in water management. The methodologies for characterizing such assessments, however, usually fail to reflect temporal and spatial variations at local scales. In this paper, we employ four widely-used characterization factors, which were originally developed with global estimates of water demand and availability, to evaluate the impact that inter-basin transfer (IBT) of water has on water risk assessments and, consequently, on the evaluation of the soundness of water cycle. The study was conducted for two major river basins in Japan, where diversion channels were built to move water from the Tone river basin to the Arakawa river basin. Considering IBT, the available water in the Arakawa river basin increases a 45%, reducing the characterization factors a 44% on average and denoting their tendency to overestimate the risk in this basin, while the Tone river basin increased the characterization factors a 28% on average by IBT. Moreover, with a simple example we show how ambiguity in the definition of some characterization factors may cause significant changes in the result of the assessments. Finally, we concluded that local water footprint characterization can be more helpful in local assessment of water resources if the results are unanimous, Targetable, Replicable, Ameliorable, Comparable, and Engageable (uTRACE).

Mixing zone studies in the Grand River Basin

1984 ◽  
Vol 11 (2) ◽  
pp. 204-216 ◽  
Author(s):  
T. P. Halappa Gowda ◽  
L. E. Post
Keyword(s):  
River Basin ◽  
River Flow ◽  
Residual Chlorine ◽  
Mixing Zone ◽  
Planning Period ◽  
Management Options ◽  
Zone Management ◽  
Basin Water ◽  
Grand River ◽  
The Impact

A steady state mathematical model based on the "stream tube" concept was utilized to evaluate the impact of various viable management options on the mixing zone boundaries for nonionized ammonia and total residual chlorine at the Grand River below Waterloo, Kitchener, and Galt, and the Speed River below Guelph. The options evaluated as part of the Grand River Basin Water Management Study include various river flows and effluent flows projected for the planning period 1981–2031. The predictions indicate that a zone of passage equal to 60% of river flow is attainable for chlorine in all cases except in the Speed River below Guelph beyond the year 2001, and in-plant nitrification is required at Waterloo and Kitchener under the present conditions in order to comply with the objective for nonionized ammonia. At Guelph, with in-plant nitrification, the model predicts that the ammonia objective will not be met for existing and future summer conditions and for winter conditions beyond the year 2001. For Galt, the ammonia objective is met with conventional secondary treatment under all options. The maximum longitudinal boundary of limited use zone for various options is also summarized. Key words: ammonia, chlorine, limited use zone, management options, mixing zone, modelling, rivers, zone of passage.

scholarly journals Estimation of soil loss by the USLE model in a mountain basin in the south of Santa Catarina state, Brazil

2020 ◽  
Vol 24 ◽  
pp. e20
Author(s):  
Lucas Kister Amaral ◽  
Sabrina Baesso Cadorin ◽  
Álvaro José Back ◽  
Fernanda Dagostin Szymanski ◽  
Claudia Weber Corseuil
Keyword(s):  
River Basin ◽  
Soil Loss ◽  
Rainfall Erosivity ◽  
Intense Rainfall ◽  
Slope Length ◽  
Control Practice ◽  
Runoff Potential ◽  
Shallow Soils ◽  
The Impact ◽  
Very High

Water erosion is a factor of soil degradation that is triggered by the impact of raindrops originated by intense rainfall disaggregating the soil, followed by the carrying of particles by surface runoff. In the erosion process, in addition to soil loss, nutrients, fertilizers, and pesticides are carried resulting in water courses and water pollution. Erosion can have a major impact on agricultural production, when soil use and management techniques are not used. Therefore, this study aimed to evaluate the soil loss in the Malacara river basin, which is a sub-basin of the Mampituba river basin characterized by a contrasting relief, with high altitudes in the escarps of Serra Geral and floodplain. The method used for the development of this research was the application of the Universal Soil Loss Equation (USLE). USLE soil loss estimation requires the following factors: rainfall erosivity (R), soil erodibility (K), slope length (L), slope steepness (S), soil use and management (C), and erosion control practice factor (P). The estimated rainfall erosivity was 5,754.2 MJ mm ha-1 h-1 year-1. Erodibility was determined for the soils present in the basin, highlighting a high value for gleysoil. The topographic factor (LS) showed values from 0 to greater than 20, which corresponds to the low to very high runoff potential. The floodplain showed lower runoff rates, while for the locations close to the enclosed valleys in the Malacara canyon, the runoff potential varied from high to very high. The soil use and management factors and conservation practices (CP) obtained a maximum value of 0.404, corresponding to the exposed soil; the second most representative class was agricultural areas, with a value of 0.145. The soil loss in the Malacara river basin varied from 0 to more than 200 t ha-1 year-1. In fact, 87.38% of the area presents a degree of sheet erosion normal to slight and, only 2.94% of the area has a high or very high degree of erosion. Moreover, due to the relief characteristics with shallow soils and intense rainfall in mountainous basins, knowing and understanding soil losses due to erosion is crucial for the adequate management of water resources in river basins. 

scholarly journals BUILDING THE MODEL OF MANAGEMENT AND INFORMATION SHARING OF ENVIRONMENTAL WATER QUALITY – DONG NAI BASIN AS A CASE STUDY

2011 ◽  
Vol 14 (1) ◽  
pp. 16-28
Author(s):  
Long Ta Bui ◽  
Truong Duy Cao ◽  
Huong Thi My Hoang
Keyword(s):  
Water Quality ◽  
Waste Management ◽  
Information Sharing ◽  
River Basin ◽  
Environmental Water ◽  
River Basin Scale ◽  
Legal Documents ◽  
Basin Scale ◽  
Basin Water ◽  
The Impact

Recently, due to the impact of natural factors and human activities, the water quality in several basins in Vietnam has been seriously degraded. Pressing issues happening in the entire river basin-scale is polluted by waste from urban and industrial areas, oil spills and waste management. So far the system of policies and legal documents relating to protection of water quality basin is still missing and not synchronized, ensure funding for activities to protect water quality basin not meeting actual requirements. In particularly, there is no information data system to cater for the management of basin water quality which is the core of the problem of environmental protection of river basins. The main reason that make pollution happened at the entire river basin scale is bad waste management. which partly due to the lack of a good system of technical data and legal documents related to protection of river basin water quality. In this paper, we present research results from the process of building model for management and information sharing of environmental water quality at Dong Nai river basin.

scholarly journals Snow cover dynamics and hydrological regime of the Hunza River basin, Karakoram Range, Northern Pakistan

2011 ◽  
Vol 8 (2) ◽  
pp. 2821-2860 ◽  
Author(s):  
A. A. Tahir ◽  
P. Chevallier ◽  
Y. Arnaud ◽  
B. Ahmad
Keyword(s):  
Snow Cover ◽  
River Basin ◽  
Water Resource Management ◽  
Hydrological Regime ◽  
Winter Precipitation ◽  
Climate Data ◽  
Indus River ◽  
The Impact ◽  
Basin Area ◽  
Hunza River

Abstract. A major proportion of flow in the Indus River is contributed by its snow- and glacier-fed river catchments situated in the Himalaya, Karakoram and Hindukush ranges. It is therefore essential to understand the cryosphere dynamics in this area for water resource management. The MODIS MOD10A2 remote-sensing database of snow cover products from March 2000 to December 2009 was selected to analyse the snow cover changes in the Hunza River basin (the snow- and glacier-fed sub-catchment of the Indus River). A database of daily flows for the Hunza River at Dainyor Bridge over a period of 40 years and climate data (precipitation and temperature) for 10 years from three meteorological stations within the catchment was made available to investigate the hydrological regime in the area. Analysis of remotely sensed cryosphere (snow and ice cover) data showed a slight expansion of snow cover in the area in contrast to most of the regions in the world where glaciers are melting rapidly. This increase in snow cover may be the result of an increase in winter precipitation caused by westerly circulation. The impact of global warming is not effective because a large part of the basin area lies under high altitudes where the temperature remains negative throughout most of the year.

scholarly journals Snow cover dynamics and hydrological regime of the Hunza River basin, Karakoram Range, Northern Pakistan

2011 ◽  
Vol 15 (7) ◽  
pp. 2275-2290 ◽  
Author(s):  
A. A. Tahir ◽  
P. Chevallier ◽  
Y. Arnaud ◽  
B. Ahmad
Keyword(s):  
Snow Cover ◽  
River Basin ◽  
Water Resource Management ◽  
Hydrological Regime ◽  
Winter Precipitation ◽  
Climate Data ◽  
Indus River ◽  
The Impact ◽  
Basin Area ◽  
Hunza River

Abstract. A major proportion of flow in the Indus River is contributed by its snow- and glacier-fed river catchments situated in the Himalaya, Karakoram and Hindukush ranges. It is therefore essential to understand the cryosphere dynamics in this area for water resource management. The MODIS MOD10A2 remote-sensing database of snow cover products from March 2000 to December 2009 was selected to analyse the snow cover changes in the Hunza River basin (the snow- and glacier-fed sub-catchment of the Indus River). A database of daily flows for the Hunza River at Dainyor Bridge over a period of 40 yr and climate data (precipitation and temperature) for 10 yr from three meteorological stations within the catchment was made available to investigate the hydrological regime in the area. Analysis of remotely sensed cryosphere (snow and ice cover) data during the last decade (2000–2009) suggest a rather slight expansion of cryosphere in the area in contrast to most of the regions in the world where glaciers are melting rapidly. This increase in snow cover may be the result of an increase in winter precipitation caused by westerly circulation. The impact of global warming is not effective because a large part of the basin area lies under high altitudes where the temperature remains negative throughout most of the year.

Tsunami modelling of the 7250 cal years BP Betsiamites submarine landslide

2018 ◽  
Vol 477 (1) ◽  
pp. 293-301 ◽  
Author(s):  
Dominique Turmel ◽  
Jacques Locat ◽  
Jonathan Leblanc ◽  
Geneviève Cauchon-Voyer
Keyword(s):  
Tsunami Wave ◽  
Submarine Landslide ◽  
Lawrence Estuary ◽  
Runout Distance ◽  
Tsunami Modelling ◽  
The North ◽  
St Lawrence Estuary ◽  
Short Time ◽  
The Impact ◽  
Very High

AbstractOn the north shore of the St Lawrence Estuary (Québec, Canada), near the Betsiamites river delta, a large sub-aerial submarine landslide complex was mapped using multi-beam bathymetry and light detection and ranging (LiDAR) data. Previous analysis of this landslide complex revealed that, since 7250 cal years BP, at least four different landsliding events occurred to form the present morphology, in which over 2 km3 of material have been mobilized. The 7.25 cal ka BP landslide is of particular interest here: this landslide is entirely submarine and mobilized about 1.3 km3 of material, deposited over an area of 54 km2, which make this landslide the largest identified on the St Lawrence estuary seafloor. This landslide showed a runout distance of about 15 km. Landslide-generated tsunamis may be triggered by such a landslide, where a large volume of material is mobilized in a short time. Kinematic analysis of this landslide was previously performed, and here we use these analyses in order to perform tsunami wave generation and propagation modelling. It is shown in this analysis that, even if the mobilized volume is very high and there is a long runout, the tsunami generated is small with tsunami wave amplitudes of <1.5 m, except in the vicinity of the landslide. The highest tide elevation in this part of the St Lawrence Estuary is about 5.5 m, so the impact of such a tsunami wave may be limited.

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