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    Disciplines / Research questions

    Water engineering

    10 research topics · 29 questions

    Divergence of Different Rainfall-Runoff Models in Extreme Flood Extrapolation4 questions

    1. Infiltration-based loss model structures for event-based simulation and extrapolation of large floods

    2. Reconciling statistical and rainfall–runoff estimates of design floods: predicting storage-threshold step changes in flood frequency curves and bounding the sensitivity of extreme quantiles to model and design-precipitation choices

    3. Conditions under which predictive-uncertainty estimates lose reliability when forecasting high flows in an extrapolation context

    4. Generalizing GLUE-based uncertainty in continuous-simulation design flood estimation across model structures, climates, and basin scales

    Marginal Failure of Urban Sponge Measures Against Extreme Rainfall Flooding2 questions

    1. Generalizing the synergistic effect between LID facility placement and drainage-network characteristics into transferable placement rules and a systematic optimization framework

    2. Where is the tipping point at which cumulative green infrastructure yields catchment-scale reductions in urban surface-water flood peaks?

    Statistical Identification of Earthquake Risks Induced by Dams4 questions

    1. Generalizing and validating the spectral shape-factor ratio k=Ω/fpk=\Omega/f_{p} as a precursor indicator of reservoir-induced seismicity

    2. Joint statistical attribution of tectonic and reservoir-induced seismicity in Southwestern China using a non-stationary-background ETAS model

    3. Robust discrimination of reservoir-induced from natural seismicity: a comprehensive quantitative diagnostic framework and the sensitivity of singular spectrum analysis in short seismic catalogs

    4. Fractal and complex-network statistics as discriminators of reservoir-triggered seismicity: the unresolved 3D correlation-dimension and clustering-coefficient questions of the 2004 Itoiz earthquake sequence

    Scale Mismatch in Groundwater-Surface Water Coupled Models3 questions

    1. Quantifying degrees of freedom and multi-domain data requirements for identifiable calibration of coupled surface-subsurface hydrologic models

    2. Verified multiscale modeling of hyporheic exchange across the major classes of river morphology

    3. Regimes of adequacy for sequential versus fully coupled groundwater–surface water modeling, and the definition of hydrograph separation in integrated models

    Whether the Recurrence Interval of Design Floods Remains Interpretable under Non-Stationary Climate2 questions

    1. Coherent design-life risk under climate nonstationarity: trend-structure selection and fusion of observations, climate-model projections, and scenario uncertainty

    2. Recurrent-extreme waiting times under combined nonstationarity and serial dependence

    Contribution Decomposition of Rapid Sediment Reduction in Rivers to Delta Subsidence3 questions

    1. Closing the present-day subsidence budget of the Ganges-Brahmaputra delta: partitioning sediment and ocean loading from compaction, anthropogenic, and tectonic drivers

    2. Constraining the sediment-loading (isostatic) contribution to present-day subsidence of the Ganges-Brahmaputra-Meghna Delta

    3. Quantitative separation of natural sediment compaction from anthropogenic drivers of land subsidence across the Yellow River Delta

    Transferability of environmental-flow thresholds across rivers1 questions

    1. Ecological validation and robust applicability rules for the MTMMHC-III modified Tennant environmental-flow criteria

    Pareto Instability of Hydropower, Flood Control, and Ecological Goals in Reservoir Group Joint Operation2 questions

    1. Incorporating nonstationary climate-change and human-activity drivers into copula–conditional-entropy risk analysis of the water supply–hydropower–environment nexus in cascade reservoir operation

    2. Quantifying the five-objective competition mechanism of the giant upper-Yangtze reservoir system: flood control as an explicit objective at refined flood-season resolution, with hydraulic/hydrological coupling

    Parameter Non-Identifiability Caused by Parameter Equifinality in Hydrological Models4 questions

    1. Likelihood-function sensitivity and the non-identifiability of the interflow recession constant KKSSKK_{SS} in GLUE uncertainty analysis of the Xin'anjiang rainfall-runoff model

    2. Separating model-structure error from parameter error in rainfall-runoff predictions of catchment change under realistic data limits

    3. Making conceptual snow-hydrology models identifiable and climate-projection-robust: calibration strategy versus model structure (GR4J–Cemaneige)

    4. Multiple behavioural-solution identification strategies in DDS-AU and the Distance-to-Ideal metric as a convergence criterion: extending subjectivity reduction from GLUE to informal rainfall–runoff uncertainty estimation methods

    Whether Virtual Water Trade Really Alleviates Pressure in Water-Scarce Regions4 questions

    1. Whether and under what conditions virtual water trade relieves rather than exacerbates water stress in water-scarce regions

    2. Virtual water export from water-scarce Northwest China: persistence beyond 2015 and quantitative evaluation of countermeasures

    3. Uncertainty-quantified accounting of China's interprovincial virtual water trade: does trade save or cost national water resources under refined sectoral, temporal, and consumption-based estimates?

    4. Quantifying real scarce-water savings from interregional virtual water flows in China: production-feasible counterfactuals, endogenous water stress, and locally validated stress data

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