Magazine et Edition

Volume 70 (2022): Edition 3 (September 2022)

Volume 70 (2022): Edition 2 (June 2022)

Volume 70 (2022): Edition 1 (March 2022)

Volume 69 (2021): Edition 4 (December 2021)

Volume 69 (2021): Edition 3 (September 2021)

Volume 69 (2021): Edition 2 (June 2021)

Volume 69 (2021): Edition 1 (March 2021)

Volume 68 (2020): Edition 4 (December 2020)

Volume 68 (2020): Edition 3 (September 2020)

Volume 68 (2020): Edition 2 (June 2020)

Volume 68 (2020): Edition 1 (March 2020)

Volume 67 (2019): Edition 4 (December 2019)

Volume 67 (2019): Edition 3 (September 2019)

Volume 67 (2019): Edition 2 (June 2019)

Volume 67 (2019): Edition 1 (March 2019)

Volume 66 (2018): Edition 4 (December 2018)

Volume 66 (2018): Edition 3 (September 2018)

Volume 66 (2018): Edition 2 (June 2018)

Volume 66 (2018): Edition 1 (March 2018)

Volume 65 (2017): Edition 4 (December 2017)

Volume 65 (2017): Edition 3 (September 2017)

Volume 65 (2017): Edition 2 (June 2017)

Volume 65 (2017): Edition 1 (March 2017)

Volume 64 (2016): Edition 4 (December 2016)

Volume 64 (2016): Edition 3 (September 2016)

Volume 64 (2016): Edition 2 (June 2016)

Volume 64 (2016): Edition 1 (March 2016)

Volume 63 (2015): Edition 4 (December 2015)

Volume 63 (2015): Edition 3 (September 2015)

Volume 63 (2015): Edition 2 (June 2015)

Volume 63 (2015): Edition 1 (March 2015)

Volume 62 (2014): Edition 4 (December 2014)

Volume 62 (2014): Edition 3 (September 2014)

Volume 62 (2014): Edition 2 (June 2014)

Volume 62 (2014): Edition 1 (March 2014)

Volume 61 (2013): Edition 4 (December 2013)

Volume 61 (2013): Edition 3 (September 2013)

Volume 61 (2013): Edition 2 (June 2013)

Volume 61 (2013): Edition 1 (March 2013)

Volume 60 (2012): Edition 4 (December 2012)

Volume 60 (2012): Edition 3 (September 2012)

Volume 60 (2012): Edition 2 (June 2012)

Volume 60 (2012): Edition 1 (March 2012)

Volume 59 (2011): Edition 4 (December 2011)

Volume 59 (2011): Edition 3 (September 2011)

Volume 59 (2011): Edition 2 (June 2011)

Volume 59 (2011): Edition 1 (March 2011)

Volume 58 (2010): Edition 4 (December 2010)

Volume 58 (2010): Edition 3 (September 2010)

Volume 58 (2010): Edition 2 (June 2010)

Volume 58 (2010): Edition 1 (March 2010)

Volume 57 (2009): Edition 4 (December 2009)

Volume 57 (2009): Edition 3 (September 2009)

Volume 57 (2009): Edition 2 (June 2009)

Volume 57 (2009): Edition 1 (March 2009)

Détails du magazine
Format
Magazine
eISSN
1338-4333
ISSN
0042-790X
Première publication
28 Mar 2009
Période de publication
4 fois par an
Langues
Anglais

Chercher

Volume 61 (2013): Edition 3 (September 2013)

Détails du magazine
Format
Magazine
eISSN
1338-4333
ISSN
0042-790X
Première publication
28 Mar 2009
Période de publication
4 fois par an
Langues
Anglais

Chercher

10 Articles
access type Accès libre

Integrated Flood Management for Beiyun River, China

Publié en ligne: 24 Aug 2013
Pages: 177 - 187

Résumé

Abstract

Beiyun River Basin is holistically suffering a water shortage and relatively concentrated flood risk. The current operation (level-control) of dams and floodgates, which is in passive defense mode, cannot meet the demands of both flood control and storm water resources. An integrated flood forecasting and management system is developed by the connecting of the hydrological model and hydrodynamic model and coupling of the hydrodynamic model and hydraulic model for dams and floodgates. Based upon the forecasted runoff processes, a discharge-control operation mode of dams and floodgates is proposed to be utilized in order to well regulate the flood routing in channels. The simulated water level, discharge, and water storage volume under different design conditions of rainfall return periods and floodgates operation modes are compared. The results show that: (1) for small floods, current operation modes can satisfy the objectives, but discharge-control operation can do better; (2) for medium size floods, since pre-storing of the floods affects the discharge of follow-up floods by floodgates, the requirement of flood control cannot be satisfied under current operations, but the discharge-control operation can; (3) for large floods, neither operation can meet the requirement because of the limited storage of these dams. Then, the gravel pits, wetlands, ecological lakes and flood detention basins around the river must be used for excess flood waters. Using the flood forecasting and management system can change passive defense to active defense mode, solving the water resources problem of Beijing city and Beiyun River Basin to a certain extent.

Keywords

  • Rainstorm
  • Hydrological model
  • Hydrodynamic model
  • Hydraulic model
  • Water resources
  • Dams and floodgates
access type Accès libre

Influence of Hydrological Situations on Benthic Organisms in a Small River in Saxony (Germany)

Publié en ligne: 24 Aug 2013
Pages: 188 - 194

Résumé

Abstract

This research was focused on the relationship between river discharge and organism drift. It was carried out for three years in a small heavily modified river in Saxony (Germany). The amount and species composition of drifting invertebrates were observed, depending on discharge and flow velocity. A station was installed where the flow velocity was continually measured and drifting organisms were caught with nets. An inventory of the aquatic community (benthic invertebrates) was taken to determine the species living in the river at the research station. The highest drift density measured was 578 organisms per m3 at a flow velocity of 0.90 m s-1, the mainly drifting organisms were Chironomidae. Different organisms groups started drifting at different flow velocities. Heavy impacts, such as dredging the river and flood waves, affected the aquatic ecosystems and severely changed the aquatic community regarding the number and the diversity. Some of the aquatic invertebrates such as the Anthothecata completely disappeared after dredging. It was found that many different terrestrial organisms were part of the drift. The typical family of soil biota Collembola represented the largest share.

Keywords

  • Macrozoobenthos
  • Drift
  • Discharge
  • Flow velocity
access type Accès libre

Comparison of an Automated and Manual Method for Calculating Storm Runoff Response in Ungauged Catchments in Serbia

Publié en ligne: 24 Aug 2013
Pages: 195 - 201

Résumé

Abstract

Estimation of discharge from ungauged catchments based on rainfall-runoff analysis is a very frequent task in engineering hydrology. Very often, design discharges are needed for streams or small rivers where no streamflow data is available (river training works, culverts, small hydropower plants, etc). This study uses a well established lumped hydrologic rainfall-runoff model to compare two different approaches in data preparation. The traditional method of manual obtainment of catchment parameters was compared to a more contemporary methodology using automation with geographic information systems, digital terrain models and available datasets, with an emphasis on open-source tools and freely available datasets. Both techniques were implemented on more than 100 catchments in Serbia to calculate storm runoff response. The results show minor differences that are insignificant compared to the time and resources saved with the automated techniques. The use of such automated methods enables the hydrologist to direct more attention to other factors that influence discharge even more than catchment parameters, such as rainfall, soil and land use data.

Keywords

  • Hydrology
  • Rainfall-runoff modeling
  • Ungauged catchments
  • GIS
access type Accès libre

Numerical Study of Near-Bed Turbulence Structures Influence on the Initiation of Saltating Grains Movement

Publié en ligne: 24 Aug 2013
Pages: 202 - 207

Résumé

Abstract

The focus of this paper is on the analysis of the influence of near-bed turbulence structures with the inclusion of existing coherent structures on the entrainment of saltating particles in a water stream from the Lagrangian perspective. The interactions between turbulence structures and initiation of particles movement is the key for better understanding of the physics of sediment transport and particles behaviour. These aims are addressed by use of a 3D relevant model of spherical saltating particles, in which a special procedure has been designed to produce coherent structures. In this method, the spectra of turbulent kinetic energy, consisting of four ranges, are used to generate the time series of turbulent velocities in the streamwise, vertical and transversal directions. Numerical results suggest that the initiation of sediment movement is strongly correlated to positive streamwise velocity fluctuations and as such, supports earlier laboratory experimental and field observations, showing that the sweeps and outward interactions play a crucial role in the initiation of saltating particles’ movement.

Keywords

  • Entrainment
  • Numerical simulations
  • Saltation
  • Sediment transport
  • Turbulence structures
access type Accès libre

Influence of Water Temperature on Results of Current Meter Calibration and Measurement

Publié en ligne: 24 Aug 2013
Pages: 208 - 213

Résumé

Abstract

On the basis of the results of calibration of current meters at water of varying temperatures, a hypothesis that water temperature influences measured water velocities was formulated. The analysis of our long-term data showed that the water temperature does have an influence on measured water velocity. This influence can be taken into account for practical purposes as a contribution to the uncertainty of measurements. The influence depends on the type of current meter propeller. This paper presents results obtained for the Ott C-2 current meter with propellers of the types 1, 2, 3, 5 and 6. Our analysis showed that the uncertainty is equal or less than 5% for measurements carried out in water with temperatures above 8°C. The differences between measured water velocities for water temperatures 5°C and 20°C reached maximum 6% (depending on the propeller) in a slowly flowing water (rotational frequency n = 1 s-1). For rotational velocity n ≥ 2 s-1 the differences between velocities measured at water temperatures 5 and 20°C were mostly under 3%. The less influenced propeller is of type 3 for which the uncertainty of measurement does not reach 5% even for water temperature 1°C if the rotational frequency is bigger than 0.7 s-1.

Keywords

  • Current meter
  • Measurement uncertainty
  • Water temperature influence
access type Accès libre

Predicting Longitudinal Dispersion Coefficients in Sinuous Rivers by Genetic Algorithm

Publié en ligne: 24 Aug 2013
Pages: 214 - 221

Résumé

Abstract

In the present work, existing empirical expressions for longitudinal dispersion coefficient of rivers (K) are evaluated. They are found inadequate primarily because these expressions ignore the channel sinuosity, an important parameter representing a river’s transverse irregularities that affect mixing process. Hence, a new expression for K is derived taking into account the sinuosity besides few of other hydraulic and geometric characteristics of a river. The model makes use of genetic algorithm (GA) on published field data. Based on several performance indices, the new expression is found superior to many existing expressions for estimating K. The sensitivity and error analysis conducted on parameters of the new expression show the channel sinuosity an important input for predicting K accurately. Any error in measurement of sinuosity would lead to significant deviation in the longitudinal dispersion coefficient in sinuous rivers.

Keywords

  • Dispersion coefficients
  • Dispersion
  • Genetic algorithm
  • Pollutant transport
  • Sinuous rivers
access type Accès libre

Shape of the Nappe During Free Overfall from a Rectangular Channel with Zero Bed Slope

Publié en ligne: 24 Aug 2013
Pages: 222 - 231

Résumé

Abstract

The paper deals with selected procedures used to calculate the shape of compact nappe during free overfall from a smooth horizontal channel with rectangular cross section. Calculated and measured water surface and velocity conditions in the end section, the level of water surface upstream in front of the end section and the shape of the compact part of an overfall nappe are described for a particular compared case.

Keywords

  • Nappe shape
  • End depth
  • Free overfall
  • Confined nappe
  • Unconfined nappe
  • Numerical modelling
  • Experimental measurement
access type Accès libre

Estimation of Suspended Sediment Concentrations with Adcp in Danube River

Publié en ligne: 24 Aug 2013
Pages: 232 - 240

Résumé

Abstract

An estimation procedure for suspended sediment concentrations based on the intensity of backscattered sound of acoustic Doppler current profilers (ADCP) is introduced in this paper. Based on detailed moving and fixed boat ADCP measurements with concurrent sediment sampling, we have successfully calibrated the estimation method for a reach of River Danube in Hungary, characterized by significant suspended sediment transport. The effect of measurement uncertainty and various data filtering on sediment load determination is also analyzed and quantified. Some of the physical model parameters describing the propagation of sound in water are estimated based on known empirical formulas, while other parameters are derived from measured. Regression analysis is used to obtain a relationship between the intensity of backscattered sound and sediment concentrations. The empirical relationship has been then used to estimate the suspended sediment concentrations from the ADCP data collected in fixed and moving boat measurement operation mode, along verticals and path-lines, respectively. We show that while some measurement uncertainty is inherent to the acoustic Doppler principle, it is further enhanced by the complexity of the near-bottom sediment-laden flow. This uncertainty has then a significant effect on the local sediment load estimation. In turn, reasonable smoothing of raw velocity and backscatter intensity data shows insignificant impact on cross-sectional sediment load estimation.

Keywords

  • Suspended sediment concentration
  • ADCP
  • Danube
access type Accès libre

Bedload Equation Analysis Using Bed Load-Material Grain Size

Publié en ligne: 24 Aug 2013
Pages: 241 - 249

Résumé

Abstract

Twelve predictive bedload sediment transport equations are rated against 14 sets of gravel-bed river field data collected by handheld bedload sampler in Narmab River, northeastern Iran. To evaluate these formulas two types of grain size namely bedload and bed material were used. The results show that the equations of Engelund and Hansen, Van Rijn and Einstein perform well with bed material grain size, while Shocklitsch, Meyer-Peter and Mueller, and Frijlink yield the best results using the bedload grain size.

Keywords

  • Sediment transport
  • Grain size
  • Gravel-bed river
  • Evaluation
access type Accès libre

Exact Analytical Solutions for Contaminant Transport in Rivers

Publié en ligne: 24 Aug 2013
Pages: 250 - 259

Résumé

Abstract

Contaminant transport processes in streams, rivers, and other surface water bodies can be analyzed or predicted using the advection-dispersion equation and related transport models. In part 1 of this two-part series we presented a large number of one- and multi-dimensional analytical solutions of the standard equilibrium advection-dispersion equation (ADE) with and without terms accounting for zero-order production and first-order decay. The solutions are extended in the current part 2 to advective-dispersive transport with simultaneous first-order mass exchange between the stream or river and zones with dead water (transient storage models), and to problems involving longitudinal advectivedispersive transport with simultaneous diffusion in fluvial sediments or near-stream subsurface regions comprising a hyporheic zone. Part 2 also provides solutions for one-dimensional advective-dispersive transport of contaminants subject to consecutive decay chain reactions.

Mots clés

  • Contaminant transport
  • Analytical solutions
  • Surface water
  • Transient storage models
  • Solute decay chains
10 Articles
access type Accès libre

Integrated Flood Management for Beiyun River, China

Publié en ligne: 24 Aug 2013
Pages: 177 - 187

Résumé

Abstract

Beiyun River Basin is holistically suffering a water shortage and relatively concentrated flood risk. The current operation (level-control) of dams and floodgates, which is in passive defense mode, cannot meet the demands of both flood control and storm water resources. An integrated flood forecasting and management system is developed by the connecting of the hydrological model and hydrodynamic model and coupling of the hydrodynamic model and hydraulic model for dams and floodgates. Based upon the forecasted runoff processes, a discharge-control operation mode of dams and floodgates is proposed to be utilized in order to well regulate the flood routing in channels. The simulated water level, discharge, and water storage volume under different design conditions of rainfall return periods and floodgates operation modes are compared. The results show that: (1) for small floods, current operation modes can satisfy the objectives, but discharge-control operation can do better; (2) for medium size floods, since pre-storing of the floods affects the discharge of follow-up floods by floodgates, the requirement of flood control cannot be satisfied under current operations, but the discharge-control operation can; (3) for large floods, neither operation can meet the requirement because of the limited storage of these dams. Then, the gravel pits, wetlands, ecological lakes and flood detention basins around the river must be used for excess flood waters. Using the flood forecasting and management system can change passive defense to active defense mode, solving the water resources problem of Beijing city and Beiyun River Basin to a certain extent.

Keywords

  • Rainstorm
  • Hydrological model
  • Hydrodynamic model
  • Hydraulic model
  • Water resources
  • Dams and floodgates
access type Accès libre

Influence of Hydrological Situations on Benthic Organisms in a Small River in Saxony (Germany)

Publié en ligne: 24 Aug 2013
Pages: 188 - 194

Résumé

Abstract

This research was focused on the relationship between river discharge and organism drift. It was carried out for three years in a small heavily modified river in Saxony (Germany). The amount and species composition of drifting invertebrates were observed, depending on discharge and flow velocity. A station was installed where the flow velocity was continually measured and drifting organisms were caught with nets. An inventory of the aquatic community (benthic invertebrates) was taken to determine the species living in the river at the research station. The highest drift density measured was 578 organisms per m3 at a flow velocity of 0.90 m s-1, the mainly drifting organisms were Chironomidae. Different organisms groups started drifting at different flow velocities. Heavy impacts, such as dredging the river and flood waves, affected the aquatic ecosystems and severely changed the aquatic community regarding the number and the diversity. Some of the aquatic invertebrates such as the Anthothecata completely disappeared after dredging. It was found that many different terrestrial organisms were part of the drift. The typical family of soil biota Collembola represented the largest share.

Keywords

  • Macrozoobenthos
  • Drift
  • Discharge
  • Flow velocity
access type Accès libre

Comparison of an Automated and Manual Method for Calculating Storm Runoff Response in Ungauged Catchments in Serbia

Publié en ligne: 24 Aug 2013
Pages: 195 - 201

Résumé

Abstract

Estimation of discharge from ungauged catchments based on rainfall-runoff analysis is a very frequent task in engineering hydrology. Very often, design discharges are needed for streams or small rivers where no streamflow data is available (river training works, culverts, small hydropower plants, etc). This study uses a well established lumped hydrologic rainfall-runoff model to compare two different approaches in data preparation. The traditional method of manual obtainment of catchment parameters was compared to a more contemporary methodology using automation with geographic information systems, digital terrain models and available datasets, with an emphasis on open-source tools and freely available datasets. Both techniques were implemented on more than 100 catchments in Serbia to calculate storm runoff response. The results show minor differences that are insignificant compared to the time and resources saved with the automated techniques. The use of such automated methods enables the hydrologist to direct more attention to other factors that influence discharge even more than catchment parameters, such as rainfall, soil and land use data.

Keywords

  • Hydrology
  • Rainfall-runoff modeling
  • Ungauged catchments
  • GIS
access type Accès libre

Numerical Study of Near-Bed Turbulence Structures Influence on the Initiation of Saltating Grains Movement

Publié en ligne: 24 Aug 2013
Pages: 202 - 207

Résumé

Abstract

The focus of this paper is on the analysis of the influence of near-bed turbulence structures with the inclusion of existing coherent structures on the entrainment of saltating particles in a water stream from the Lagrangian perspective. The interactions between turbulence structures and initiation of particles movement is the key for better understanding of the physics of sediment transport and particles behaviour. These aims are addressed by use of a 3D relevant model of spherical saltating particles, in which a special procedure has been designed to produce coherent structures. In this method, the spectra of turbulent kinetic energy, consisting of four ranges, are used to generate the time series of turbulent velocities in the streamwise, vertical and transversal directions. Numerical results suggest that the initiation of sediment movement is strongly correlated to positive streamwise velocity fluctuations and as such, supports earlier laboratory experimental and field observations, showing that the sweeps and outward interactions play a crucial role in the initiation of saltating particles’ movement.

Keywords

  • Entrainment
  • Numerical simulations
  • Saltation
  • Sediment transport
  • Turbulence structures
access type Accès libre

Influence of Water Temperature on Results of Current Meter Calibration and Measurement

Publié en ligne: 24 Aug 2013
Pages: 208 - 213

Résumé

Abstract

On the basis of the results of calibration of current meters at water of varying temperatures, a hypothesis that water temperature influences measured water velocities was formulated. The analysis of our long-term data showed that the water temperature does have an influence on measured water velocity. This influence can be taken into account for practical purposes as a contribution to the uncertainty of measurements. The influence depends on the type of current meter propeller. This paper presents results obtained for the Ott C-2 current meter with propellers of the types 1, 2, 3, 5 and 6. Our analysis showed that the uncertainty is equal or less than 5% for measurements carried out in water with temperatures above 8°C. The differences between measured water velocities for water temperatures 5°C and 20°C reached maximum 6% (depending on the propeller) in a slowly flowing water (rotational frequency n = 1 s-1). For rotational velocity n ≥ 2 s-1 the differences between velocities measured at water temperatures 5 and 20°C were mostly under 3%. The less influenced propeller is of type 3 for which the uncertainty of measurement does not reach 5% even for water temperature 1°C if the rotational frequency is bigger than 0.7 s-1.

Keywords

  • Current meter
  • Measurement uncertainty
  • Water temperature influence
access type Accès libre

Predicting Longitudinal Dispersion Coefficients in Sinuous Rivers by Genetic Algorithm

Publié en ligne: 24 Aug 2013
Pages: 214 - 221

Résumé

Abstract

In the present work, existing empirical expressions for longitudinal dispersion coefficient of rivers (K) are evaluated. They are found inadequate primarily because these expressions ignore the channel sinuosity, an important parameter representing a river’s transverse irregularities that affect mixing process. Hence, a new expression for K is derived taking into account the sinuosity besides few of other hydraulic and geometric characteristics of a river. The model makes use of genetic algorithm (GA) on published field data. Based on several performance indices, the new expression is found superior to many existing expressions for estimating K. The sensitivity and error analysis conducted on parameters of the new expression show the channel sinuosity an important input for predicting K accurately. Any error in measurement of sinuosity would lead to significant deviation in the longitudinal dispersion coefficient in sinuous rivers.

Keywords

  • Dispersion coefficients
  • Dispersion
  • Genetic algorithm
  • Pollutant transport
  • Sinuous rivers
access type Accès libre

Shape of the Nappe During Free Overfall from a Rectangular Channel with Zero Bed Slope

Publié en ligne: 24 Aug 2013
Pages: 222 - 231

Résumé

Abstract

The paper deals with selected procedures used to calculate the shape of compact nappe during free overfall from a smooth horizontal channel with rectangular cross section. Calculated and measured water surface and velocity conditions in the end section, the level of water surface upstream in front of the end section and the shape of the compact part of an overfall nappe are described for a particular compared case.

Keywords

  • Nappe shape
  • End depth
  • Free overfall
  • Confined nappe
  • Unconfined nappe
  • Numerical modelling
  • Experimental measurement
access type Accès libre

Estimation of Suspended Sediment Concentrations with Adcp in Danube River

Publié en ligne: 24 Aug 2013
Pages: 232 - 240

Résumé

Abstract

An estimation procedure for suspended sediment concentrations based on the intensity of backscattered sound of acoustic Doppler current profilers (ADCP) is introduced in this paper. Based on detailed moving and fixed boat ADCP measurements with concurrent sediment sampling, we have successfully calibrated the estimation method for a reach of River Danube in Hungary, characterized by significant suspended sediment transport. The effect of measurement uncertainty and various data filtering on sediment load determination is also analyzed and quantified. Some of the physical model parameters describing the propagation of sound in water are estimated based on known empirical formulas, while other parameters are derived from measured. Regression analysis is used to obtain a relationship between the intensity of backscattered sound and sediment concentrations. The empirical relationship has been then used to estimate the suspended sediment concentrations from the ADCP data collected in fixed and moving boat measurement operation mode, along verticals and path-lines, respectively. We show that while some measurement uncertainty is inherent to the acoustic Doppler principle, it is further enhanced by the complexity of the near-bottom sediment-laden flow. This uncertainty has then a significant effect on the local sediment load estimation. In turn, reasonable smoothing of raw velocity and backscatter intensity data shows insignificant impact on cross-sectional sediment load estimation.

Keywords

  • Suspended sediment concentration
  • ADCP
  • Danube
access type Accès libre

Bedload Equation Analysis Using Bed Load-Material Grain Size

Publié en ligne: 24 Aug 2013
Pages: 241 - 249

Résumé

Abstract

Twelve predictive bedload sediment transport equations are rated against 14 sets of gravel-bed river field data collected by handheld bedload sampler in Narmab River, northeastern Iran. To evaluate these formulas two types of grain size namely bedload and bed material were used. The results show that the equations of Engelund and Hansen, Van Rijn and Einstein perform well with bed material grain size, while Shocklitsch, Meyer-Peter and Mueller, and Frijlink yield the best results using the bedload grain size.

Keywords

  • Sediment transport
  • Grain size
  • Gravel-bed river
  • Evaluation
access type Accès libre

Exact Analytical Solutions for Contaminant Transport in Rivers

Publié en ligne: 24 Aug 2013
Pages: 250 - 259

Résumé

Abstract

Contaminant transport processes in streams, rivers, and other surface water bodies can be analyzed or predicted using the advection-dispersion equation and related transport models. In part 1 of this two-part series we presented a large number of one- and multi-dimensional analytical solutions of the standard equilibrium advection-dispersion equation (ADE) with and without terms accounting for zero-order production and first-order decay. The solutions are extended in the current part 2 to advective-dispersive transport with simultaneous first-order mass exchange between the stream or river and zones with dead water (transient storage models), and to problems involving longitudinal advectivedispersive transport with simultaneous diffusion in fluvial sediments or near-stream subsurface regions comprising a hyporheic zone. Part 2 also provides solutions for one-dimensional advective-dispersive transport of contaminants subject to consecutive decay chain reactions.

Mots clés

  • Contaminant transport
  • Analytical solutions
  • Surface water
  • Transient storage models
  • Solute decay chains

Planifiez votre conférence à distance avec Sciendo