Research on Monitoring method of Urban Road Waterlogging Depth Based on Deep Learning and Ellipse Detection by LIAO Yuhong, HUANG Guoru

“…In order to solve the problem that the traditional urban waterlogging monitoring methods consume a lot of manpower and material resources and also have a high cost,which cannot meet the needs of comprehensive and rapid monitoring of urban flood,a method of monitoring the depth of urban road waterlogging using deep learning and ellipse detection algorithm is applied,which constructs a computation model of the urban road waterlogging depth by detecting and segmenting the wheels of different types of vehicles on the images through a deep learning model and using ellipse detection algorithm to extract the geometric characteristic parameters of submerged wheels.Verified by typical video monitoring sites in Dongying City,The results show that the average positioning precision and segmentation precision of the model on the dataset can reach over 94%;the model has a good monitoring effect on waterlogging depth for vehicles on both the directly lateral side and the oblique lateral side in actual waterlogging monitoring;furthermore,the results at the near point are better than that at the far point,and the results for vehicles on the directly lateral side are better than the oblique lateral side.The results can lay the foundation for further research,and provide technical support for urban waterlogging monitoring and flood emergency management.…”
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Preventing flow table overflow against denial of service attack in software defined network by Dongbin WANG, Dongzhe WU, Hui ZHI, Kun GUO, Xu ZHANG, Jinqiao SHI, Yu ZHANG, Yueming LU

“…Aiming at denial of service attacks would cause overflow of the limited flow table space of the switch in software defined network, failure to install flow table rules for normal network packets, packet forwarding delay, and packet loss, FloodMitigation was proposed to prevent flow table overflow against denial of service attacks in software defined network.The management of the rate-limit flow rule installation based on available flow table space was adopted to limit the maximum installation speed of flow rules and the number of flow table space occupied by switch ports with denial-of-service attacks, and avoid flow table overflow.In addition, path selection based on available flow table space was adopted to balance flow table utilization of switches among multiple forwarding paths to avoid denial of service attacks on switches with less available flow table in the path.The experimental results demonstrate that FloodMitigation can effectively alleviate the harm of denial of service attacks in terms of preventing switch flow table overflow and packet loss, reducing resource consumption of controllers, and ensuring packet forwarding delay.…”
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The Effects of Low-Impact Development Best Management Practices on Reducing Stormwater Caused by Land Use Changes in Urban Areas: A Case Study of Tehran City, Iran by Sajedeh Rostamzadeh, Bahram Malekmohammadi, Fatemeh Mashhadimohammadzadehvazifeh, Jamal Jokar Arsanjani

“…Urbanization growth and climate change have increased the frequency and severity of floods in urban areas. One of the effective methods for reducing stormwater volume and managing urban floods is the low-impact development best management practice (LID-BMP). …”
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Study on Variation of Surface Runoff and Soil Moisture Content in the Subgrade of Permeable Pavement Structure by Lijun Hou, Yuan Wang, Fengchun Shen, Ming Lei, Xiang Wang, Xiaochong Zhao, Shuling Gao, Abdullah Alhaj

“…Permeable roads can greatly alleviate the pressure of urban drainage and reduce the risk of storms and floods.…”
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Coral reef restoration can reduce coastal contamination and pollution hazards by Marina E. Rottmueller, Curt D. Storlazzi, Fabian Frick

“…Abstract Coral reef restoration can reduce the wave-driven flooding for coastal communities. However, this protection has yet to be assessed in terms of the reduced risk of flood-driven environmental contamination. …”
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A Water Management Model for Toshka Depression by K. M. Fassieh, M. A. Zaki

“…It is required to assess the contribution of TD as a spillway, in enhancing the effectiveness of Lake Nasser in flood control and water availability. However, most related previous works are descriptive and use qualitative methods. …”
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Delta intérieur du fleuve Niger au Mali – quand la crue fait la loi : l’organisation humaine et le partage des ressources dans une zone inondable à fort contraste. by Marie-Laure De Noray

“…One million people, especially fishers, cattle herders and flood recession farmers are using the delta for their subsistence or for export production. …”
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Study on the Water Volume of Erhai Lake in Yunnan Plateau by LI Hongyan

“…Based on the monitoring results of hydrological factors such as measured discharge,precipitation,evaporation and outflow in the Erhai Lake Basin from 1956 to 2018,this paper calculates the natural water volume of the Erhai Lake by using two related methods,namely the principle of watershed generation and convergence and the water balance,and studies the trend and periodicity of natural water volume in Erhai Lake over the years through the Manner-Kendall method and wavelet analysis method.The results show that:The natural water volume calculated by the two methods in Erhai Lake for many years is relatively close,with the relative error of 0.5%,that is 851.9 million cubic meters,among which the water production in the lake area is -93.2 million cubic meters,and the water volume of the land is 944.9 million cubic meters (north (a)>west (b)>southeast (c)>east (d),accounting for 54.9%,33.2%,6.9%,and 4.9% of the land water volume,respectively);The natural water volume in the Erhai Lake throughout the year,the flood season,and the dry season show a decreasing trend with time,especially in the flood season;There are periodic changes in the water volume around 9,12,21,and 32 a,which led to the trend of rich and dry changes in the natural water volume of Erhai Lake.…”
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Summer Drought Patterns in the Middle-Lower Reaches of the Yangtze River Basin and Their Connections with Atmospheric Circulation before and after 1980 by Shuping Li, Guolin Feng, Wei Hou

“…For the southern drought and northern flood pattern during 1961–1979, the zonal circulation was straight and an anomalous anticyclonic circulation was located over Japan. …”
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River Flow Estimation from Upstream Flow Records Using Support Vector Machines by Halil Karahan, Serdar Iplikci, Mutlu Yasar, Gurhan Gurarslan

“…A novel architecture for flood routing model has been proposed and its efficiency is validated on several problems by employing support vector machines. …”
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Laboratory Evaluation of Time-Domain Reflectometry for Bridge Scour Measurement: Comparison with the Ultrasonic Method by Xinbao Yu, Xiong Yu

“…TDR methods are also found less influenced by turbulence and air bubbles, both likely to occur during flood events.…”
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Analysis of Changes in Rainfall-Runoff Process of Dakeng River in Guangzhou Before and After Urbanization by WAN Ru'nan, LIN Kairong, XIAO Mingzhong, WANG Simin, LI Biqi

“…These changes will pose new challenges for water resources management and flood control in the Dakeng River Basin.…”
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Modeling of the flow time series for a short-term hydrological forecast by Tomasz Jarosław Siuta

“…Aim of the study: Within this article an example of an effective approach to real-time, short term forecast of flood rates within Vistula river differential catchment was presented. …”
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Exploration of the Mountainous Urban Rail Transit Resilience Under Extreme Rainfalls: A Case Study in Chongqing, China by Chenhui Liu, Xue Su, Zhichun Wu, Yingjun Zhang, Cuizhu Zhou, Xiangguo Wu, Yong Huang

“…Extreme rainfalls could greatly affect operations of urban rail transit systems of mountainous cities, which are prone to have landslides and floods under rainfalls. Therefore, it is essential to assess and enhance the resilience of mountainous urban rail transit networks under heavy rainfalls. …”
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Identifikasi Dini Curah Hujan Berpotensi Banjir Menggunakan Algoritma Long Short-Term Memory (Lstm) Dan Isolation Forest by Ahmad Wijayanto, Aris Sugiharto, Rukun Santoso

“…Abstract High rainfall is a key factor causing floods in an area. Increasingly irregular rainfall patterns and rising extreme rainfall make it more challenging to control floods. …”
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Denoising of Inflow of Pingzhai Reservoir Based on Fusion Algorithm of Wavelet Transform and Savitzky-Golay Filter by GAO Lin, SONG Jinwei, LI Zuoxiao

“…This method was applied to the historical flood events of Pingzhai Reservoir to infer the inflow, and the relative error of flood peak, peak time difference, and smoothness were set as evaluation indicators. …”
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Case Study of Urban Stormwater Simulation in Foshan Based on Urban Time-Variant Gain Model by WANG Chao, GONG Siqi, XIAO Yu

“…The prerequisite for urban stormwater simulation and analysis is to accurately grasp urban rainfall-runoff response laws.This paper analyzes the nonlinear response law of rainfall-runoff and builds a TVGM-urban model to simulate and analyze the measured rainfall and storm scenarios designed under different recurrence periods by taking the Baolitongjifu neighborhood in Chancheng District,Foshan as the research object.The results are as follows.There is a power function correlation between rainfall and runoff in the city.The non-linear relationship between maximum rainfall intensity and peak flood flow can be verified by eight selected flood data in the neighborhood with the fitting effect of the power function (R²=0.6207,p<0.05) better than that of the linear relationship (R²=0.5629,p<0.05).Based on the identification of the catchment area and the subsurface classification,the TVGM-urban model is built in the Baolitongjifu neighborhood,and the model accuracy is verified by the measured rainfall and runoff data.Generally,the simulation results ensure that the Nash efficiency coefficient is greater than 0.7,and the simulation error of the water volume and peak value is within 20%,which can well meet the urban stormwater simulation requirements.The results can provide support and references for analyzing urban rainfall and runoff response laws and studying urban stormwater simulation.…”
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Application of Distributed Hydrological Model Based on NRIHM in Humid Watershed by XU Qin, LIU Lulin, LONG Jie, JIN Chen, CAI Jing, LIN Xiaoqing, ZHANG Kun

“…The relative errors of average flood peak and flood volume were also less than 20 %, indicating that the model could better simulate the actual runoff process, which preliminarily proved that the model had good applicability in humid areas.…”
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Study on Variation Law and Influencing Mechanism of Water and Sediment in Henan Reaches of the Yellow River by XUAN Xiaobo, DOU Ming, LIU Bojun

“…The Henan reaches of the Yellow River is a typical wandering reach, which has a severe impact on the river habitat due to the severe variation of water and sediment, frequent swing of the main channel, and serious deformation of the riverbed.Based on the water and sediment data of Xiaolangdi, Huayuankou, and Gaocun hydrological stations from 1960 to 2019, this paper explores the variation cycle characteristics of water and sediment in the Henan reaches of the Yellow River by using statistical methods such as Mann-Kendall test, sliding T test, and wavelet analysis.The contribution rate of rainfall and human activities to the decrease in runoff and sediment transport in the Henan reaches of the Yellow River is quantitatively evaluated by the double mass curve method.The results show that the decreasing trend of annual sediment transport is greater than that of annual runoff in the Henan reaches.From Xiaolangdi to Huayuankou, erosion and deposition are basically balanced, and from Huayuankou to Gaocun, deposition is dominant.The flood season in the Henan reaches is dominated by sediment deposition, and the non-flood season is dominated by scour.The sediment transport in Xiaolangdi station changed greatly in 1997, while the runoff and sediment transport in Huayuankou and Gaocun stations changed significantly in 1985.The water and sediment regulation greatly increases runoff instead of sediment transport.Human activities play a leading role in the decrease in runoff and sediment transport in the Henan reaches of the Yellow River, with an average contribution rate of 80.94% to runoff and 94.95% to sediment transport in the Henan reaches of the Yellow River.…”
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The Relationship between the Atmospheric Heat Source over Tibetan Plateau and the Westerly-Monsoon Evolution in August and Its Physical Mechanism by Chunxue Wang, Yueqing Li

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