Evaluation and optimization of urban hydrological connectivity based on graph theory: A case study in Chengdu, China

Ecological Informatics, Journal Year: 2024, Volume and Issue: 82, P. 102749 - 102749

Published: July 30, 2024

The standardization of river system structures has reduced hydrological connectivity, exerting significant pressure on both ecology and urban development. precise diagnosis proposal optimization strategies remain key challenges. This study utilizes graph theory to delineate the network topology in Chengdu city establishes an evaluation index (α, β, γ) for connectivity. Spatiotemporal changes Chengdu's connectivity from 2000 2020 are analyzed, alongside a validated scheme focusing "pressure dispersion" among nodes. findings reveal simplification structure over past two decades, marked by reduction 72 nodes 81 segments. Particularly center (region II), these have significantly diminished overall Following implementation method, distribution critical Region II been more equitably, enhancing resilience against disasters like floods diversifying burden Furthermore, indices showed improvements post-optimization, with α, γ rising 75%, 7.26%, respectively, thereby validating efficacy approach. Analyzing variations parameters across systems identifies vulnerable links fundamental issues, laying groundwork future improvements. proposed methodology offers insights applicable cities worldwide grappling similar

Language: Английский

---

Optimization of Low-Impact Development (LID) Parameters Using SWMM and Response Surface Methodology at the Community Scale

Water, Journal Year: 2025, Volume and Issue: 17(8), P. 1165 - 1165

Published: April 14, 2025

The parameters of Low-Impact Development (LID) facilities significantly influence their operational performance and runoff control effectiveness at the site. Despite extensive research on LID effectiveness, limited studies have focused optimizing design a community-wide scale, integrating both hydrological statistical methodologies. A novel approach to was presented in this study. This study established community-scale SWMM model, identified key by Morris screening method, determined reasonable parameter ranges based effects. Response Surface Methodology (RSM) applied optimize under different return periods impervious area ratios. results showed that for volume were berm height surface layer sunken greenbelt (SG_Surface_H), conductivity soil (SG_Soil_I), permeability pavement permeable (PP_Pavement_I), thickness storage (PP_Storage_T). 50–265 mm, 5–80 mm/h, 50–140 100–165 respectively. peak flow reduction SG_Surface_H, SG_Soil_I, PP_Pavement_I, vegetated swale (VS_Surface_H). 50–260 5–50 50–195 50–145 optimization rate, strategy involved increasing SG_Surface_H as period increased when ratio large, especially rehabilitation old communities. Meanwhile, optimal value SG_Soil_I greater than reduction. In contrast, PP_Pavement_I larger provides significant reference planning emphasizing parameters.

Language: Английский

---

Seasonal contributions and efficiency analysis of green-gray-blue coupled infrastructures system for the improvement of water quality in urban lakes

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 382, P. 125379 - 125379

Published: April 21, 2025

Language: Английский

---

Optimizing the LID Facility Layout Considering the Impacts of the Terrain Slope and Rainfall Frequency on the Implementation Cost

Water Resources Management, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Language: Английский

---

Hydrological Performance Assessment of Low-Impact Development Practices: A Vegetated Swale Case Study

Water, Journal Year: 2024, Volume and Issue: 16(14), P. 2018 - 2018

Published: July 16, 2024

The increase in rainfall intensity caused by climate change, combined with high levels of urban soil sealing and the limited capacity drainage systems, is significantly increasing flooding risk. Integrated stormwater management a key factor dealing consequences change mitigating flood risk based on nature-based solutions. An experimental site was designed to assess hydrological response vegetated swales depending different catchment surfaces, evaluate impact spatial variability hydraulic conductivity (K). A model developed EPA SWMM calibrated measured data two active surfaces (N6—50 m2 N11—100 m2). validation assessed NSE scores higher than 0.7. simulations considered various factors, such as water level swales, actual rainfall, evapotranspiration, swale geometry, area (Sa), conductivities natural silty soil, assess, for heaviest event, best morphological characteristics. study examined K (8) Sa (6) storage capacity, 250 mm depth. showed that overflow limit exceeded N10 (90 m2) when ≤ 2 × 10−6 m/s, N11 (100 4 m/s. These results provide valuable information optimal swales’ geometrical physical properties.

Language: Английский

---

Cultural Exchange and Transmission of Values in Tourism: A Study of Opportunities and Challenges in the Context of Globalization

Applied Mathematics and Nonlinear Sciences, Journal Year: 2024, Volume and Issue: 9(1)

Published: Jan. 1, 2024

Abstract This paper, drawing from the definitions of globalization, tourism cultural exchange, and value dissemination, formulates a set 15 observational variables. Using mathematical statistical methods, author constructs structural equation model that includes concept globalization as exogenous latent variable exchange dissemination endogenous After estimating using partial least squares method, combines relevant data to conduct an empirical analysis model. The reveals modified fitting parameters, based on squares, have values GFI = 0.933, CFI 0.931, TLI 0.927, RMSEA 0.046, PGFI 0.667, PNFI 0.758, indicating relatively satisfactory fit for There is strong positive relationship between three paths: idea → (0.428, 0.005), (0.579, 0.048), expression (0.587, 0.019). mediating effect responsible 28.35% relationship, while direct 71.65%. means plays significant role in partially ideas dissemination.

Language: Английский

---

The Hydrologic Mitigation Effectiveness of Bioretention Basins in an Urban Area Prone to Flash Flooding

Water, Journal Year: 2024, Volume and Issue: 16(18), P. 2597 - 2597

Published: Sept. 13, 2024

The hydrologic performance and cost-effectiveness of green stormwater infrastructure (GSI) in climates with highly variable precipitation is an important subject urban management. We measured the effects two bioretention basins San Antonio, Texas, a growing city region prone to flash flooding. Pre-construction, inflow, outflow hydrographs were compared test whether reduced peak flow magnitude altered metrics flashiness, including rate rise fall. determined construction annual maintenance cost one basin antecedent moisture conditions mitigation effectiveness. flashiness when comparing inflow pre-construction hydrographs, reducing magnitudes by >80% on average. Basin was not strongly affected or conditions, though range sampled limited. Construction costs higher than previously reported projects, but similar no maintain equivalent landscaped area. Results indicate that effectively mitigate even flash-flood-prone environments, which should benefit downstream ecosystems. results provide unique assessment environments can inform optimization implementing GSI at watershed scales regions current future regimes.

Language: Английский

---

Research on the Influencing Factors of Artistic Creation of Fine Arts Painting in the Context of Visual Culture

Applied Mathematics and Nonlinear Sciences, Journal Year: 2024, Volume and Issue: 9(1)

Published: Jan. 1, 2024

Abstract The creators of fine art painting are often affected by the conceptualization and imagination factors, expression techniques methods, as well influence theme subject selection, etc., they unable to commit themselves artistic power infectious works. This paper constructs PLS-SEM BN combined structural equation model in context visual culture, analyzes latent variables path relationship with for empirical testing, predicts diagnoses causal between Bayesian network. Finally, a questionnaire survey was conducted among major creation groups Guangzhou, China, factors were extracted using principal component analysis. constructed is collected data β coefficients paths all greater than 0.42 significant at least 0.05 level, creative motivation, environment, personal industry skill positively outcome. When level achievement drawing “high”, probability that environment high higher, probabilities 0.742 0.701. motivation “high” level. individual’s more likely be “high,” 0.726. study allows timeliness dynamics harmonized linked painter provides certain references improvement skills creator painting.

Language: Английский

---

Research on Entrepreneurial Competency Cultivation of College Students Toward Common Wealth

Applied Mathematics and Nonlinear Sciences, Journal Year: 2024, Volume and Issue: 9(1)

Published: Jan. 1, 2024

Abstract In modern society, innovation and entrepreneurship education have gradually transcended the traditional paradigm, intertwined with concept of commonwealth, constructed a new picture vitality social sentiment. terms research ideas, this paper extracts value-shaping elements, service learning creation faculty curriculum organizational leadership interest group practical elements as entrepreneurial competence cultivation college students according to their growth pattern, environment they have, resources possess. We obtained four crucial factors for individual, group, school, levels through micro-level analysis. model cultivating in support seven hierarchical factors. end, was analyzed using PLS-SEM model. It has been verified that 11 out 13 hypotheses proposed were supported testing. paths passed significance test found after further The most significant path is SF->IE->PO under policy anchoring force, effect sizes t-statistics 0.325 7.494, respectively. way, we refined methodology co-enrichment skills among university students.

Language: Английский

---

Optimization Path of Innovation and Entrepreneurship Ability of College Students in the Context of High-Quality Development

Applied Mathematics and Nonlinear Sciences, Journal Year: 2024, Volume and Issue: 9(1)

Published: Jan. 1, 2024

Abstract Studying the influencing factors of college students’ innovation and entrepreneurship ability is crucial to optimizing students in context high-quality development. Based on this, this paper constructs an SEM structural equation model improves convergence PLS algorithm using least squares solution optimal iteration initial value for model. Then, correlation analysis done between six factors, such as national policy, birthplace, entrepreneurial activities, ability, finally, hypothesis influence verified by test. The main results are follows: constructed a with five levels 18 ranked their importance. model’s fit coefficient 0.927>0.9 sign high degree regression coefficients dimensions calculated according 0.781, 0.939, 0.243, 0.935, 0.839. All have significant positive impact entrepreneurship. This finds that there place origin, education, internship experience, optimization path ability.

Language: Английский

---