Research on the Influence in Complex River Network Area for Waterway Regulation

In order to study the influence of the navigation improvement project in the Qingyi River, on flood control of the complex river network, the water level variation of the key control stations in Shuiyang, Qingyi and Zhanghe river basins, flood diversion variation of middle reach of Shuiyang stem and flow pattern in the flow field before and after construction of the project using Mike11 model, under the conditions of designed flood and excessive standard flood. The results show that after construction of the project,the water levels at the control stations are decreasing or constant and the flood diversion of middle reach of Shuiyang stem decreases. So the project is beneficial to the flood control of the basins.

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A hydrodynamic model coupled multiple scenarios for plain river network and its application

MATEC Web of Conferences ◽

10.1051/matecconf/201824601016 ◽

2018 ◽

Vol 246 ◽

pp. 01016

Author(s):

Zhiqiang Zeng ◽

Ji Liang ◽

Mingxiang Yang ◽

Zhaocai Zeng ◽

Yu Lang

Keyword(s):

Water Level ◽

Flood Control ◽

Water Storage ◽

River Network ◽

Runoff Simulation ◽

Simulation Accuracy ◽

Storage Effects ◽

Storage Area ◽

Multiple Scenarios ◽

Flood Diversion

The plain river network is not only complex in shape but also contains many complex scenarios, such as interval inflow and outflow, hydraulic structures and water storage area, etc., which increases the difficulty of runoff simulation in plain river network. To address this problem, a hydrodynamic (HD) model coupled multiple scenarios that may occur in plain river network was proposed, which was used to simulate the runoff process of the plain river network. To illustrate the proposed model, Xi River was chosen as a study area. We designed some experiments for each scenario, and the experimental results show that simulation results have good consistency with the observation. It is worth noting that the simulation accuracy of the water level is always higher than the simulation accuracy of the flow. Moreover, the runoff simulation accuracy of runoff events with large runoff is relatively high. It turns out that HD model is suitable for runoff simulation of plain river network. In addition, we compared the flood diversion effects of water storage area and sluice, and the results show that the effect of water storage area is more obvious than sluice, and the flood diversion method combined with sluice and water storage area has better flood diversion effect. In conclusion, HD model is good at simulating floodplain storage effects, backwater and the change of water level and flow under the condition of engineering dispatching, which has important guiding significance for flood control in plain river network.

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Water level effect on herbaceous plant assemblages at an artificial reservoir-Lago Azul State Park, Southern Brazil

Brazilian Journal of Biology ◽

10.1590/1519-6984.01513suppl ◽

2015 ◽

Vol 75 (4 suppl 2) ◽

pp. 131-136

Author(s):

D. C. Souza ◽

J. D. Ferreira ◽

P. A. A. Bueno ◽

L. Iwakura ◽

R. O. Bueno ◽

...

Keyword(s):

Water Level ◽

Forest Edge ◽

Herbaceous Plant ◽

Southern Brazil ◽

Level Variation ◽

Water Level Variation ◽

Rainy Period ◽

Marginal Areas ◽

Composition And Structure ◽

Before And After

This study presents the effect of water level variation on the assemblages of herbaceous species in Mourão I Reservoir, Lago Azul State Park, Southern Brazil. The structure and distribution of populations was examined in February (dry period) and April (rainy period), 2011, in two transects. These transects started at the forest edge towards the center of the lake. The end of the transect coincided with the end of the plants within the lake. On every two meters along of the transects we sampled a wooden square of 0.25 m2 for species biomass analysis.The macrophyte stand was composed entirely of emergent species. Considering the periods, most species were less frequent in the rainy period (April), but Ipomea ramosissima (Poir.) Choisy, Commelina nudiflora L., Eleocharis acuntagula (Roxb.) Schult. and Verbena litorales (Kunth.) had their frequency increased during this period, probably due to their resistance. The influence of flood as measured by the NMDS point out that both before and after the flood, there are plots with distinct compositions and biomass. The water level variation affects the dynamics of plant composition and structure in marginal areas of the Reservoir.

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EFFECTS OF WATER LEVEL VARIATIONS ON THE STABILITY OF ROCK ARMOURED SLOPES

Coastal Engineering Proceedings ◽

10.9753/icce.v36.papers.44 ◽

2018 ◽

pp. 44 ◽

Cited By ~ 1

Author(s):

Marcel R.A. Van Gent ◽

Suzanna A.A. Zwanenburg ◽

Jan Kramer

Keyword(s):

Water Level ◽

Physical Model ◽

Model Tests ◽

Water Levels ◽

Level Variation ◽

Water Level Variation ◽

Stepwise Approach ◽

Physical Model Tests ◽

Water Level Variations ◽

The Stability

Physical model tests on the stability of rock armoured slopes have been performed to demonstrate the importance of water level variations during a storm, due to a tide or a storm surge. For the stability of rock armoured slopes also the importance of the sequence of storms at various water levels has been studied. The test results indicate that a smooth sinusoidal water level variation leads to an increase in damage compared to the same wave conditions at a constant water level. Furthermore, a stepwise approach of the sinusoidal water level elevation leads to other results than the approach with a continuous water level variation, whereas the continuous water level variation resembles the peak of a storm or the tidal water level variation better than a stepwise approach. If storms with different water levels attack the armour layer, the damage is generally smaller than if all storms attack the armour layer at the same water level. Furthermore, the results have been discussed based on earlier analyses where the statistics of rock armoured slopes have been addressed and the importance of the length effect has been illustrated using a method to apply results from physical model tests to real structures.

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Response of ground-water levels of flood control operations in three basins, south-eastern Florida

Open-File Report ◽

10.3133/ofr7486 ◽

1974 ◽

Author(s):

William A.J. Pitt

Keyword(s):

Ground Water ◽

Flood Control ◽

Water Levels ◽

South Eastern

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The model and simulation of low impact development of the sponge airport, China

Water Science & Technology Water Supply ◽

10.2166/ws.2019.170 ◽

2019 ◽

Vol 20 (2) ◽

pp. 383-394 ◽

Cited By ~ 2

Author(s):

Jing Peng ◽

Jiayi Ouyang ◽

Lei Yu ◽

Xinchen Wu

Keyword(s):

Flood Control ◽

Low Impact Development ◽

Water Environment ◽

Drainage System ◽

Practical Significance ◽

International Airport ◽

Model And Simulation ◽

Impervious Area ◽

Before And After ◽

Airport Runway

Abstract Recently urban waterlogging problems have become more and more serious, and the construction of an airport runway makes the impervious area of the airport high, which leads to the deterioration of the water environment and frequent waterlogging disasters. It is of great significance to design and construct the sponge airport with low impact development (LID) facilities. In this paper, we take catchment N1 of Beijing Daxing International Airport as a case study. The LID facilities are designed and the runoff process of a heavy rainfall in catchment N1 is simulated before and after the implementation of LID facilities. The results show that the total amount of surface runoff, the number of overflow junctions and full-flow conduits of the rainwater drainage system in catchment N1 of Beijing Daxing International Airport are significantly reduced after the implementation of the LID facilities. Therefore, the application of LID facilities has greatly improved the ability of the airport to remove rainwater and effectively alleviated the risk of waterlogging in the airport flight area. This study provides theoretical support for airport designers and managers to solve flood control and rainwater drainage problems and has vital practical significance.

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Analysis of the Water Level Variation in the Polish Part of the Vistula Lagoon (Baltic Sea) and Estimation of Water Inflow and Outflow Transport through the Strait of Baltiysk in the Years 2008–2017

Water ◽

10.3390/w13101328 ◽

2021 ◽

Vol 13 (10) ◽

pp. 1328

Author(s):

Michał Szydłowski ◽

Wojciech Artichowicz ◽

Piotr Zima

Keyword(s):

Statistical Analysis ◽

Numerical Model ◽

Baltic Sea ◽

Water Level ◽

Vistula Lagoon ◽

Level Variation ◽

The Baltic Sea ◽

Water Level Variation ◽

The Baltic ◽

The Vistula Lagoon

The Vistula Lagoon is located in both Poland and Russia along the southern coast of the Baltic Sea. It is connected to the Baltic Sea in the Russian part by the Strait of Baltiysk. The purpose of the paper is to identify the dominant factors underlying the water level variation mechanism at Tolkmicko in the Vistula Lagoon, revealed by a statistical analysis of the measured data and a discussion on the inflow and outflow transport variation through the strait, estimated by numerical modeling. Seawater transport is exceptionally valuable in terms of the hydrological water balance in the lagoon. Historical research on the hydrology of the lagoon shows that the water exchange in the lagoon is quite complex due to the presence of several different sources of water balance, such as seawater inflow, river inflow, groundwater inflow, precipitation, and evaporation. Unfortunately, there are no current data on seawater inflow and outflow through the Strait of Baltiysk due to the lack of continuous flow measurements in the strait. A novelty of the current work is an in-depth statistical analysis of the water level variation in the Polish part of the lagoon over a long time period and an estimation of water transport through the Strait of Baltiysk by use of a numerical model. The model reproduces well the water level variation responding to variations in the sea level outside the lagoon and the wind action over the lagoon. The years 2008–2017 were chosen as the analysis period. A two-dimensional free surface shallow water numerical model of the lagoon was adapted to simulate the water level variation in view of the wind over the lagoon and the sea level variation at one open boundary. Finally, it was concluded that the water level variation on the Polish side of the Vistula Lagoon is dominated by two factors: the water level in the Gulf of Gdańsk and the wind over the lagoon. The average annual marine water inflow into the Vistula Lagoon was estimated to be equal to 15.87 km3.

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Optimal Operation of Floodwater Resources Utilization of Lakes in South-to-North Water Transfer Eastern Route Project

Sustainability ◽

10.3390/su13094857 ◽

2021 ◽

Vol 13 (9) ◽

pp. 4857

Author(s):

Zitong Yang ◽

Xianfeng Huang ◽

Jiao Liu ◽

Guohua Fang

Keyword(s):

Water Level ◽

Resource Utilization ◽

Flood Control ◽

Optimal Operation ◽

Water Transfer ◽

Water Levels ◽

Reservoir Storage ◽

Flood Season ◽

Hongze Lake ◽

North Water

In order to meet the demand of emergency water supply in the northern region without affecting normal water transfer, considering the use of the existing South-to-North Water Transfer eastern route project to explore the potential of floodwater resource utilization in the flood season of Hongze Lake and Luoma Lake in Jiangsu Province, this paper carried out relevant optimal operating research. First, the hydraulic linkages between the lakes were generalized, then the water resources allocation mode and the scale of existing projects were clarified. After that, the actual available amount of flood resources in the lakes was evaluated. The average annual available floodwater resources in 2003–2017 was 1.49 billion m3, and the maximum available capacity was 30.84 billion m3. Then, using the floodwater resource utilization method of multi period flood limited water levels, the research period was divided into the main flood season (15 July to 15 August) and the later flood season (16 August to 10 September, 11 September to 30 September) by the Systematic Clustering Analysis method. After the flood control calculation, the limited water level of Hongze Lake in the later flood season can be raised from 12.5 m to 13.0 m, and the capacity of reservoir storage can increase to 696 million m3. The limited water level of Luoma Lake can be raised from 22.5 m to 23.0 m (16 August to 10 September), 23.5 m (11 September to 30 September), and the capacity of reservoir storage can increase from 150 to 300 million m3. Finally, establishing the floodwater resource optimization model of the lake group with the goals of maximizing the floodwater transfer amount and minimizing the flood control risk rate, the optimal water allocation scheme is obtained through the optimization algorithm.

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Implementation of a Nurse-Driven Burn Resuscitation Protocol: A Quality Improvement Project

Critical Care Nurse ◽

10.4037/ccn2013385 ◽

2013 ◽

Vol 33 (1) ◽

pp. 25-35 ◽

Cited By ~ 7

Author(s):

Kyra Fahlstrom ◽

Cameron Boyle ◽

Mary Beth Flynn Makic

Keyword(s):

Serum Level ◽

Compartment Syndrome ◽

Abdominal Compartment Syndrome ◽

Distress Syndrome ◽

Venous Pressure ◽

Improvement Project ◽

Fluid Status ◽

Before And After ◽

Abdominal Compartment ◽

Burn Resuscitation

Background Burn resuscitation, including titration of fluids and administration of colloids, is often driven by physicians’ orders. Inconsistencies in burn resuscitation cause overresuscitation, which has adverse consequences. Methods Retrospective chart reviews were completed to evaluate fluid resuscitation and complications for 12 months before and after development and implementation of a nurse-driven burn resuscitation protocol. Results Before implementation of the protocol, results at 24 hours after injury indicated that 58% of patients were overresuscitated, had a serum level of lactate of at least 2 mmol/L (100%), and had complications (pulmonary edema 20%, abdominal compartment syndrome 7%, acute lung injury/acute respiratory distress syndrome 30%) within the first 5 days. Two outcomes differed from before to after implementation of the protocol: serum level of lactate at 24 hours (t37.8 =2.38, P =.007) and central venous pressure at 48 hours (t31 =2.27, P =.03). After implementation of the protocol, no patients had abdominal compartment syndrome develop. Conclusions Implementation of the nurse-driven burn resuscitation protocol improved nurses’ awareness and assessment of fluid status during resuscitation and improved patients’ outcomes.

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Impact of a blended curriculum on nursing handover quality: a quality improvement project

BMJ Open Quality ◽

10.1136/bmjoq-2020-001024 ◽

2021 ◽

Vol 10 (1) ◽

pp. e001024

Author(s):

Xavier Losfeld ◽

Laure Istas ◽

Quentin Schoonvaere ◽

Michel Vergnion ◽

Jochen Bergs

Keyword(s):

Educational Intervention ◽

Patient Information ◽

Professional Communication ◽

Fit Indices ◽

Negative Consequences ◽

Improvement Project ◽

Face To Face ◽

Before And After ◽

Post Test ◽

E Learning

Context and objectiveThe negative consequences of inadequate nursing handovers on patient safety are widely acknowledged, both within the literature as in practice. Evidence regarding strategies to improve nursing handover is, however, lacking. This study investigates the effect of a tailored, blended curriculum on nurses’ perception of handover quality.MethodsWe used a pre-test/post-test design within four units of a Belgian general hospital. Our educational intervention consisted of an e-learning module on professional communication and a face-to-face session on the use of a structured method for handovers. All nurses completed this blended curriculum (n=87). We used the Handover Evaluation Scale (HES) to evaluate nurses’ perception of handover quality before and after the intervention. The HES was answered by 87.4% of the nurses (n=76 of 87) before and 50.6% (n=44 of 87) after the intervention. Confirmatory factor analysis was used to assess the validity of the HES.ResultsThe original factor structure did not fit with our data. We identified a new HES structure with acceptable or good fit indices. The overall internal consistency of our HES structure was considered adequate. Perception of nurses on Relevance of information showed a significant improvement (M=53.19±4.33 vs M=61.03±6.01; p=0.04). Nurses also felt that the timely provision of patient information improved significantly (M=4.50±0.34 vs M=5.16±0.40; p=0.01).ConclusionThe applied intervention resulted in an improved awareness on the importance of Relevance of information during handovers. After our intervention, the nurses’ perception of the HES item ‘Patient information is provided in a timely manner’ also improved significantly. We are aware that the educational intervention is only the first step to achieve the long-term implementation of a culture of professional communication based on mutual support.

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