Yalong Hydro (China)

Scale-Dependent Transition from Single Fracture Interaction to Fracture Network Evolution during Supercritical CO2 Fracturing of Naturally Fractured Shale

Abstract Supercritical CO2 (ScCO2) fracturing is a promising method for shale gas stimulation because it can reduce water consumption and provide a potential route for CO2 utilization. In naturally fractured shale, stimulation performance is controlled not only by the extension o...

Synergistic Self-Healing and Seepage Resistance of Basalt Fiber-Reinforced Microbial Concrete for Pressurized Diversion Tunnel Linings

Concrete linings in pressurized diversion tunnels are susceptible to cracking and seepage under sustained hydraulic pressure and saturated service conditions, threatening their long-term durability, water-conveyance reliability, and operational safety. To improve the autonomous r...

A tolerance-based framework for optimizing profile sampling intervals in joint infilling assessment and shear strength prediction

The accurate assessment of joint infilling is critical for reliably estimating the shear strength of rock masses. While common practice often follows the International Society for Rock Mechanics (ISRM) suggestion of using a sampling interval ( ∆L ) equal to 2% of the total sample...

Multi-Objective Optimization of Relief-Well Dewatering for Canals Under High Groundwater Levels Using NSGA-II and Entropy-Weighted TOPSIS

High groundwater levels can generate excessive uplift pressure beneath canal linings, causing heaving, cracking, and sliding failure. This study developed a multi-objective framework for relief-well dewatering design in a damaged reach of the headrace canal at the HLJ Hydropower...

Assessment of Local Strain of PVC-P Geomembranes Induced by Particle Cushion Layers

This study investigates the deformation of plasticized polyvinyl chloride (PVC-P) geomembranes (GMBs) on uniform cushions and flat-rounded gravel cushions using a self-developed testing apparatus for GMB deformation and a three-dimensional (3D) laser scanner. Based on the princip...

Numerical and Physical-Model Investigation of Landslide-Generated Surge Waves from a Localized Unstable Zone in the Yangqu Canyon Reservoir: Wave Generation and Propagation

Surge waves generated by rapid landslide entry into canyon reservoirs can threaten near-dam hydraulic structures. This study examines a representative post-failure hydrodynamic scenario for the localized unstable Zone B of the No. 1 deformation body slope near Yangqu Hydropower S...

Multi-Objective Optimization of Nozzle Closing Strategies for High Head Pelton Turbines to Shorten the Nozzle Closing Time and Mitigate Water Hammer Effects

The rapid shutdown of high-head and large-capacity Pelton turbines equipped with long penstocks often induces severe water hammer effects, threatening the structural safety of the diversion system. Traditional linear or simple piecewise nozzle closing laws struggle to achieve an...