The urban agglomeration polders type of flood control pattern is a general in the eastern plain area and some secondary river basins China. A HEC-HMS model Qinhuai River basin based on was established for simulating runoff, examining impact events, estimating effects urbanization hydrological processes basin. results indicate that could increase peak flow volume. smaller scale flood, more significant influence polder to distribution city circle has no obvious volume, but effect flow. closer...

Urban agglomeration polders type of flood control pattern (UAPFCP) is an extensively used for urban in plain water system areas. Urbanization and are two main factors that affect the runoff process these regions. The Qinhuai River basin, one representative watersheds this East China, was selected to perform study. Five urbanization scenarios (the historical, current, three assumed future scenarios) basin were defined paper. Hydrologic Engineering Center’s Modeling System (HEC-HMS) simulate...

Abstract Flood control with polders is prevalent in East China. Their impact on flood processes critically important for control, but has not been well documented. The Qinhuai River Basin was selected as the study area. A Hydrologic Engineering Center – Analysis System (HEC-RAS) hydraulic model developed to simulate and predict storm associated of polders. shows that HEC-RAS capable simulating Basin. increased water level outside upstream watersheds have a greater than close basin outlets...

Urbanization can alter the hydrogeomorphology of streams and rivers, change stream network structures, reduce connectivity, which leads to a decrease in storage capacity networks aggravates flood damage. Therefore, investigation ways connectivity impacts control urbanized watersheds provide significant benefits. This study developed framework assess its impact on control. First, few indices were adopted longitudinal connectivity. Afterward, static dynamic capacities evaluated using...

Anthropogenic activities have led to the transformation of river basins and natural flow alteration around world. Alteration in regimes adverse effects on ecosystems. Flow value changes signify extent a number related indices can be used assess ecosystem. Selection few ecologically relevant from large set available is daunting task. Principal Component Analysis helps reduce these significant removes statistical redundancy data give uncorrelated sets. These representative are useful primary...

Traditional optimal operation of hydropower station usually has two problems. One is that the algorithm hasn't high efficiency, and other model pays little attention to ecology. And with development electric power market, generated benefit concerned instead energy. Based on analysis time-varying electricity price policy, an reservoir ecology consideration established. The takes maximum annual generation benefit, output minimal stage in year minimum shortage eco-environment demand as...

Abstract Polder is usually used for flood control in the river delta area. With rapid development of urbanization, dikes or pumps cut original stream network system, and connectivity (SNC) system pattern have changed. The generally force up river's water level, regional formation mechanisms processes In order to quantitatively describe characteristics polder‐type measure (PFCM) change law SNC, firstly, streams inside polders were generalized as virtual streams, a hydrological‐hydrodynamic...

Abstract Water resources carrying capacity (WRCC) has been evaluated repeatedly to guide sustainable regional development, with the increasing conflicts over water between society and nature. Urban underlying surfaces are constantly changing under rapid development of urbanization, which changed WRCC. The chaotic particle swarm genetic algorithm (CPSGA) is proposed in this study evaluate It combines (GA), optimization (COA), (PSO), as well introduces mapping COA velocity position update...

Urban agglomeration polders (UAPs) are often used to control flooding in eastern China. The impacts of UAPs on individual flood events have been extensively examined, but how risks influenced by is much less examined. This study aimed explore a three-dimensional joint distribution annual volume, peak flow and water level examine UAPs’ impact based hydrological simulations. dependence between pairwise characteristics measured rank correlation coefficients graphs. An Archimedean Copula applied...

Based on the constructed SWAT model in Qinhuai River Basin, hydrological response of flooding under different scenarios temperature and rainfall change is analyzed. The Copula function then used to calculate analyze multivariate flood risk. results show that peaks increase with precipitation decrease temperature. light floods changes stronger than medium heavy floods. Additionally, drop lead a higher risk more sensitive precipitation.

Based on graph theory, the river network was generalized by a model. Considering influence of water quantity hydrologic connectivity network, factor reflecting index taken as weighted value, quantitative evaluation model degree setted up. By calculating with MATLAB, realized. Taking Qinhuai River Basin an example, HEC-HMS hydrological established for simulation short-term and long-term flood. The level in basin under different scale floods graded results degree. showed that constructed has...

Gao, Y.; Wang, H.; Lu, X.; Xu, Zhang, Z., and Schmidt, A.R., 2018. Hydrologic impact of urbanization on catchment river system downstream from Taihu Lake. In: D. Guido-Aldana, P.A. (eds.), Select Proceedings the 3rd International Conference Water Resource Environment (WRE2017). Journal Coastal Research, Special Issue No. 84, pp. 82–88. Coconut Creek (Florida), ISSN 0749-0208.This study examined hydrologic impacts rapid a valley associated floodplain. The Lake was selected as region. Remote...

Gao, Y.; Lai, L.; Yao, M., and Ma, Z., 2019. Water environment quality assessment based on normal cloud-fuzzy variable set evaluation model. In: Guido-Aldana, P.A. Mulahasan, S. (eds.), Advances in Resources Exploration. Journal of Coastal Research, Special Issue No. 93, pp. 39–46. Coconut Creek (Florida), ISSN 0749-0208.Water environmental is an important groundwork for river planning, governance, management. A model which incorporated the minimum relative entropy weights was proposed to...

Urbanization significantly affects hydrological processes, but the influence level of urban landscape area change (ULAC) on flood magnitude has not been quantified, response laws floods with different characteristics to ULAC still needs further discussion, and effects structure shape flooding have illustrated. This paper used a Markov chain cellular automata (CA-Markov) model, Hydrologic Engineering Center's Modeling System (HEC-HMS) regression analysis method assess flooding. The Qinhuai...

Abstract The modernization of water conservancy project management is a complicated engineering system involving system, method, personnel, the exertion social, economic, and ecological effects, so on. However, indices for evaluating are usually unobtainable in practical applications. Conducting appropriate extension classical rough set theory then applying it to an incomplete information key application theory. Based on analysis some extended models systems, model based θ-improved limited...

To explore the evolution in patterns of urban water consumption (UWC) accompanying socio-economic development, historical data on conditions and developed cities worldwide were collected. stages UWC identified through Pettitt tests. Through correlation analysis, main indicators influencing identified, their threshold values for different trends statistically analyzed. The use these prediction was explored taking Changsha, China as a case study. Results indicate following: (1) typically...

Urbanization disrupts river networks, alters waterway connectivity, and elevates flood control pressure. Quantitatively assessing network changes its impact on connectivity flooding processes is imperative. This study constructed a evaluation model hydrologic-hydrodynamic to assess the network, change in Qinhuai River Basin, used scenario analysis get effectiveness of different topology changes. The results showed 0.09 decline from 2000 2010, which led 1-hour earlier peak occurrence time,...

ABSTRACT Extreme weather events are escalating globally, intensifying urban waterlogging disasters and endangering inhabitants assets while hindering socio-economic progress. This study explores factors cities' disaster mitigation using resilience theory. It introduces a pressure–state–response (PSR)–natural–economic–social (NES) assessment model to evaluate resilience, focusing on Nanjing as key city in flood control. Flood scenarios simulated the MIKE for different rainstorm recurrence...