Effects of Flood Control Strategies on Flood Resilience Under Sociohydrological Disturbances

Flood defense strategies have evolved from hard-engineered systems to nature-based solutions that advocate for sustainability to meet today’s environmental, social, and economic goals. This paper aims to analyze the historical progression and evolutionary trends in flood control strategies that have led to nature-based solutions. An evaluative literature review was conducted to narrate the evolution of nature-based flood management approaches for different flood types, river floods, coastal floods, and stormwater run-offs. The analysis reflected three evolutionary trends: the transformation of hard measures to soft measures; secondly, the increase in society’s attention to ecosystems and their services; and, finally, divergence from single-function solutions to multi-function solutions. However, continuous monitoring and evaluation of the previous projects and adapting to the lessons learned are the key to progress towards sustainable flood management strategies and their societal acceptance.

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Effect of the Tide On Flood Modeling and Mapping in Kota Tinggi, Johor Malaysia

10.21203/rs.3.rs-885029/v1 ◽

2021 ◽

Author(s):

Zulfaqar Sa’adi ◽

Ahmad Zuhdi Ismail ◽

Zulkifli Yusop ◽

Zainab Mohamad Yusof

Keyword(s):

Flood Control ◽

River Flow ◽

Control Strategies ◽

Hydrologic Model ◽

Tidal Effect ◽

Flood Modeling ◽

Reliable Technique ◽

Flood Depth ◽

Floodplain Mapping ◽

Average Similarity

Abstract This study aimed at mapping the Kota Tinggi flood event in 2006/07 that had caused massive damages to properties and the environment. The flood was associated with unusually high intensity and continuous rainfall. Therefore, a reliable technique of floodplain mapping is crucial for the improvement of flood control strategies and for preparing an evacuation plan. The main objective of this study is to compare the effect of tide on flood modeling analysis. The inundated areas were mapped for various annual recurrent intervals using peak flow data from 1965 to 2010. The study used Light Detection and Ranging (LiDAR) data for flood modeling. HEC-HMS, HEC-RAS, and HEC-GeoRAS were used to develop the flood model. The results reaffirm that the GEV model is the best for fitting the annual flood. The HEC-HMS hydrologic model was calibrated and validated using observed hydrographs in Sep 2002 and Jan 2003, respectively. Upon successful calibration and validation, the model was used to simulate flood hydrograph in Jan 2007. The modeling took into account the tidal effect. When the tidal effect was not considered, the simulated flood depth was 43 % lower than the observed flood. However, the inclusion of the tidal effect has reduced the simulation error with an average similarity of 91.4%. The simulation results show that the river flow starts to over bank for ARIs exceeded 25 years.

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A new era of flood control strategies from the perspective of managing the 2020 Yangtze River flood

Science China Earth Sciences ◽

10.1007/s11430-020-9699-8 ◽

2020 ◽

Author(s):

Jun Xia ◽

Jin Chen

Keyword(s):

Yangtze River ◽

Flood Control ◽

Control Strategies ◽

New Era ◽

River Flood

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An Integrated Framework of GRU Based on Improved Whale Optimization Algorithm for Flood Prediction

10.21203/rs.3.rs-947198/v1 ◽

2021 ◽

Author(s):

Chunlei Ji ◽

Tian Peng ◽

Chu Zhang ◽

Lei Hua ◽

Wei Sun

Keyword(s):

Time Series ◽

Optimization Algorithm ◽

Flood Control ◽

Control Strategies ◽

Whale Optimization Algorithm ◽

Flood Prediction ◽

Hybrid Strategy ◽

Mode Decomposition ◽

Whale Optimization ◽

Using Data

Abstract Accurate prediction of floods is the first step in formulating flood control strategies and reducing flood disasters. This research proposes a deep learning model based on Gate Recurrent Unit (GRU), Random Forest Algorithm (RF), Whale Optimization Algorithm (WOA) and Optimal Variational Mode Decomposition (OVMD) for flood prediction. First, the random historical time series is decomposed using OVMD. Secondly, combined with the RF feature importance measurement, select features with high importance to obtain the optimal input set. Third, use the GRU model to predict all sub-models, and use the WOA algorithm to optimize the hyperparameters in the GRU model. This study also proposes a hybrid strategy to improve the traditional WOA algorithm and enhance the optimization ability of the WOA algorithm. Finally, the prediction results of all sub-modes were aggregated to generate the final prediction result. The model was validated using data from three hydrological stations in the upper, middle and lower reaches of the Minjiang river basin in China. Through the results of the experiment, it can be seen that the proposed prediction model can effectively predict the flood time series, and has better accuracy than other models.

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Simulation and Optimization of Airport Rainwater Drainage System At Different Control Strategies

10.21203/rs.3.rs-846982/v1 ◽

2021 ◽

Author(s):

Jing Peng ◽

Lei Yu ◽

Xiang Zhong ◽

Tiansong Dong

Keyword(s):

Flood Control ◽

Control Strategies ◽

Water Environment ◽

Reduction Rate ◽

Drainage System ◽

Civil Aviation ◽

Simulation And Optimization ◽

Flow Duration ◽

Impervious Area ◽

Pump Stations

Abstract The impervious area of the airport is high, which leads to the deterioration of the water environment and frequent waterlogging disasters. The construction of sponge airport has become an important and arduous task in the new era of civil aviation design industry in China. In order to compare the effects of different control strategies at different scenarios, take the airport along China's southeast coast as an example, three scenarios were designed in this study (Scenario 1: no LID facilities and other measures; Scenario 2: two pump stations were setting; Scenario 3: both LID facilities and pump stations). Three simulation models under LID facilities and other measures were developed using SWMM with return period of 5a. The simulation results at different scenarios were compared, the number and the best opening scheme of pumps for each reservoir are finally obtained. The results of Scenario 3 show that the full-flow duration of nodes in the study area is greatly shortened. The decrease of full-flow duration of J1, J2 and J3 was 1.2, 0.8 and 0.5 hours respectively, with reduction rates of 40%, 53.3% and 28.6% respectively. The rainfall peak flows both the first and the second were reduced in this scenario, and the reduction rates were 10.68% and 12.78% respectively. However, the reduction effect of the third peak is poor with the further increase of rainfall intensity. The reduction rate of the total inflow and peak flow of rainwater buckets and permeable pavement is better than that of vegetative swale. The results of this study can provide the reference for the design of sponge airport and the airport flood control management.

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The Influence of River Channel Occupation on Urban Inundation and Sedimentation Induced by Floodwater in Mountainous Areas: A Case Study in the Loess Plateau, China

Sustainability ◽

10.3390/su11030761 ◽

2019 ◽

Vol 11 (3) ◽

pp. 761

Author(s):

Zhihui Wang ◽

Wenyi Yao ◽

Ming Wang ◽

Peiqing Xiao ◽

Jishan Yang ◽

...

Keyword(s):

Water Level ◽

Loess Plateau ◽

Flood Control ◽

Control Strategies ◽

River Channel ◽

Mitigation Measures ◽

River Channels ◽

Mountainous Areas ◽

The Loess Plateau ◽

Urban Flood

River channel occupation has made cities in the mountainous areas more vulnerable to floodwater out of river channels during rapid global urbanization. A better understanding of the influence of river channel occupation on urban flood disasters can serve as a reference in planning effective urban flood control strategies. In this study, taking a flood event that occurred on July 26th, 2017 in a city on the Loess Plateau as an example, field surveys, dynamics detection of the river channel using remote sensing technology, and scenario simulations with a two-dimensional flow and sediment model were utilized to quantitatively analyze the impacts of river channel occupation on urban inundation and sedimentation. The results show that river channel dynamics reduced by construction can be successfully detected using the combination of high-resolution images and Landsat time-series images. The variation of the water level–discharge relationship caused by the narrowing of the river channel and the increase of the flood-water level caused by water-blocking bridges/houses result in a significant reduction of the flood discharge capacity. The contribution of the narrowing of the river channel was 72.3% for the total area inundated by floodwater, whereas 57.2% of urban sedimentation was caused by the construction of bridges/houses within the river channel. Sustainable flood mitigation measures were also recommended according to the investigations and research findings in this study in order to reduce the social, environmental and economic damages caused by floods.

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Optimization of the rehabilitation of the Emscher drainage system using continuous rainfall-runoff-modeling

Water Science & Technology ◽

10.2166/wst.1997.0640 ◽

1997 ◽

Vol 36 (8-9) ◽

pp. 33-37

Author(s):

E. Pfeiffer ◽

M. Simon

Keyword(s):

Water Resources ◽

Flood Control ◽

Anthropogenic Impacts ◽

Control Strategies ◽

Drainage System ◽

Storm Event ◽

Rainfall Runoff ◽

Actual System ◽

Rainfall Runoff Model ◽

Set Up

The northbound migration of maining activities in the Emscher Region is making the open combined sewer system obsolete. This complex task requires a large number of water resources development activities in the subcatchments of tributaries. To harmonize these single activities and to evaluate their performance as part of the complete system a detailed rainfall-runoff-model of the whole Emscher system has been set up. Intensive anthropogenic impacts made it necessary to use actual system data to run advanced modeling techniques. The model set-up and first applications have been recently completed. The reconstruction of the extreme storm event of January 1995 showed excellent results. One of the major objectives is the reduction of flood levels by decentral retention measures. An evaluation matrix will be set up for the 22 potential sites for flood storage with a total volume of 4.8 million m3. Reconstruction plans developed through interdisciplinary investigations will be ranked concerning potential for realization and water resources benefits. In the mean and long range the applicability of approaches for flood control strategies using real-time forecasting models will be checked.

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EFFECT OF URBANIZATION ON ALTERNATIVE FLOOD CONTROL STRATEGIES

JAWRA Journal of the American Water Resources Association ◽

10.1111/j.1752-1688.1980.tb02453.x ◽

1980 ◽

Vol 16 (4) ◽

pp. 710-716 ◽

Cited By ~ 3

Author(s):

Richard C. Bost ◽

Philip B. Bedient ◽

Peter G. Rowe

Keyword(s):

Flood Control ◽

Control Strategies

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Estimasi Model Hidrolika Menggunakan HEC-RAS 1-D dan Tren Prediksi Strategi Mitigasi Banjir

BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil ◽

10.33558/bentang.v10i1.2692 ◽

2022 ◽

Vol 10 (1) ◽

pp. 39-48

Author(s):

Rian Mantasa Salve Prastica ◽

Asvira Ditya Siswanto

Keyword(s):

Water Level ◽

Flood Control ◽

Control Strategies ◽

Flood Mitigation ◽

Value Engineering ◽

Field Observations ◽

Construction Costs ◽

Engineering Modeling ◽

D Model ◽

Level Profile

Engineering modeling is becoming a trend and important because it can simulate a variety of decision scenarios to be applied in the field. With limited facilities and technology, 1-D modeling in hydraulics for flood mitigation is still a trend today. What are the weaknesses of this model and how is the prediction of future modeling trends? This study analyzes the flood modeling of the Tuntang River with the 1-D model using HEC-RAS to analyze the condition of the existing water level profile and flood mitigation scenarios with normalization. The results of the analysis show that the 1-D model can describe conditions in the field and scenarios clearly. However, the 1-D model has limitations because it cannot carry out simulations that consider aspects of construction costs, time, and budget allocation of stakeholders to determine the priority scale of disaster-affected areas. It requires a vulnerability analysis with field observations, 2-D or 3-D modeling, and the application of value engineering to optimize flood control strategies. With the advancement of technology, this trend is predicted to be something that will be done in the future.

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Stakeholders’ Perception of the Triggering Mechanisms and Determinants of Flooding in Limbe, South West Region of Cameroon

Asian Journal of Geographical Research ◽

10.9734/ajgr/2020/v3i430113 ◽

2020 ◽

pp. 17-34

Author(s):

Robert Njilla Mengnjo Ngalim ◽

Simbo Terence Nunyui

Keyword(s):

Flood Control ◽

Quantitative Methods ◽

Control Strategies ◽

Secondary Data ◽

Primary Data ◽

Anthropogenic Factors ◽

Qualitative And Quantitative Methods ◽

Triggering Mechanisms ◽

Study Sites ◽

The City

The study investigates stakeholders’ perception of the triggering mechanisms and determinants of flooding episodes in Limbe. Primary data were collected using questionnaires administered in ten (10) study sites. Interviews were conducted, field observation and measurement carried out on the drain sizes, height and duration of flooding. Secondary data were obtained from text books and journals. Data were analysed using qualitative and quantitative methods. Findings revealed that a plethora of triggering mechanisms of flooding were identified and analysed under natural and anthropogenic factors. However, of all these factors, prolonged rainfall and the inadequacy and narrowness of drains were perceived to be the most important triggering mechanisms of flooding in Limbe. The study concluded that flooding is a hazard that has been plaguing the city of Limbe for close to two decades and therefore needs appropriate flood control strategies to be employed to effectively control flooding since it cannot be completely stopped in some parts of Limbe. Since the inadequacy / narrowness of drains was perceived as the most important triggering mechanism of flooding in Limbe, it was recommended that wide drains be constructed in all the flood prone and flood affected areas in the city of Limbe.

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