Uncertainty assessment of river water levels on energy head loss through hydraulic control structures

2016 ◽  
pp. 863-870
Author(s):  
P Meert ◽  
F Pereira ◽  
P Willems
Keyword(s):  
River Water ◽  
Uncertainty Assessment ◽  
Head Loss ◽  
Water Levels ◽  
Hydraulic Control ◽  
Control Structures

scholarly journals Water Quality Modeling of Bhima River by using HEC-RAS Software

2020 ◽  
Vol 9 (3) ◽  
pp. 2886-2889
Keyword(s):  
Water Quality ◽  
River Water ◽  
Hydrodynamic Model ◽  
Algal Blooms ◽  
Agricultural Runoff ◽  
Water Quality Modeling ◽  
Water Quality Model ◽  
River Water Quality ◽  
Water Levels ◽  
Quality Model

The River has got religious importance in India. The Bhima River is beginning from Bhimashankar hill and it flows through some parts of Maharashtra and Karnataka state. The assessment of water quality for the development of the places near the bank of River is important. These is controlled by various manmade activities. The quality of river water resources is facing problems because of the continuous agricultural runoff, development and urbanization. Due to mixing of nutrients causes algal blooms, which results eutrophication. The modeling of water quality can be deliberated as useful tool for assessing river water. Bhima River is demarcated as a major and important water body located in Pandharpur, dist. Solapur, Maharashtra. As Pandharpur is having historical background and known as one of the famous Holly places in Maharashtra, this place is facing huge population fluctuation due to migrated pilgrims and rapid growth of urbanization. These two things detrimentally affect River water quality. The main objective of current study was to develop a hydrodynamic model combined with river water quality model for the Bhima River to measure and recognize the processes harmful for the River. For Bhima River a hydrodynamic model was constructed using the HEC-RAS 4.1 software combined with a river water quality model to estimate the amount, distribution and sources of algae, nitrate and temperature. The river model has standardized with the help of previous water levels near the Pandharpur region. It has standardized and calibrated for the assessed parameters by competing them with the present data. The result showed a relationship between DO and temperature range. DO level in Pandharpur and Gopalpur were observed to be fluctuating with respective temperature and during Vari season. However, wastewater discharge from Nalha in sample station 3 i.e. Goplapur shows slit changes in DO and due to this there is necessity to learn other parameters also.

An improved approach to monitoring Brahmaputra River water levels using retracked altimetry data

2018 ◽  
Vol 211 ◽  
pp. 112-128 ◽  
Author(s):  
Qi Huang ◽  
Di Long ◽  
Mingda Du ◽  
Chao Zeng ◽  
Xingdong Li ◽  
...  
Keyword(s):  
River Water ◽  
Water Levels ◽  
Altimetry Data ◽  
Brahmaputra River

The effect of the variation of river water levels on the estimation of groundwater recharge in the Hsinhuwei River, Taiwan

2009 ◽  
Vol 59 (6) ◽  
pp. 1297-1307 ◽  
Author(s):  
Jung-Wei Chen ◽  
Hsun-Huang Hsieh ◽  
Hsin-Fu Yeh ◽  
Cheng-Haw Lee
Keyword(s):  
Groundwater Recharge ◽  
River Water ◽  
Water Levels

scholarly journals A Technical Evaluation of Lidar‐Based Measurement of River Water Levels

2020 ◽  
Vol 56 (4) ◽  
Author(s):  
Jonathan D. Paul ◽  
Wouter Buytaert ◽  
Neeraj Sah
Keyword(s):  
River Water ◽  
Water Levels ◽  
Technical Evaluation

Erosion of unconsolidated gravel beds

1985 ◽  
Vol 12 (3) ◽  
pp. 559-566 ◽  
Author(s):  
S. P. Chee ◽  
E. M. Yuen
Keyword(s):  
Analytical Study ◽  
Local Scour ◽  
Hydraulic Control ◽  
Control Structures ◽  
Gravel Beds ◽  
Water Jets ◽  
River Bed ◽  
Motion Condition ◽  
Scour Hole ◽  
Tail Water

In any riverbed degradation phenomenon, the vertical dimension of the deepest part of the scour hole is a pertinent parameter since all the other erosion parameters describing the configuration of the scour hole depend on its numerical value. Hence, it is necessary to be able to evaluate the maximum depth of the scour hole.For most practical situations, the impingement of submerged water jets on a granular riverbed occurs at an angle, and it is the object of this study to include the effects of obliqueness in the analysis. Some examples of the effects of impingement by water jets are the erosion problems caused by plunging water jets from hydraulic control structures as they discharge into the tail-water downstream.Basic to an understanding of the mechanism of local scour is the concept of "initiation of motion." Hence, the analytical study will use this concept to derive generalized relations that will link the incipient motion condition at the deepest point of the scour hole with the numerical value of the scoured depth. In addition, care was taken to ensure that only those hydraulic variables that are frequently used in hydraulic engineering design are included in the analysis in order to make the results useful to practicing engineers. Key words: local scour, maximum erosion, river bed, plunge basin, diving jets, energy dissipation, riverbed degradation.

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