Changjiang Institute of Survey, Planning, Design and Research

Physics-constrained large language model-assisted optimal scheduling approach for hydro-wind-solar systems considering multi-level backwater effects

Multi-level backwater effects couple downstream reservoir water levels with upstream tailwater levels and effective heads, which complicates the long-term coordinated scheduling of cascade hydro–wind–solar systems. This study addresses this scheduling problem by developing a phys...

Water and salt migration model of solidified sulfate-contaminated soil by full solid waste cementitious materials

The limitations of the research on the water-salt migration of sulfate-stained soil using solid waste as the sole binding material, such as the difficulty in characterizing the hydration reaction products over time, were addressed in this study. The research focused on different...

Identifying Controlling Climate Factors Conducive to Water and Nitrogen Export from an Agricultural Watershed During the Snowmelt Runoff Period Using the SWAT Model

Abstract. Temperature and precipitation variations during the freezing-thawing period affect snowmelt and accompanying nitrogen export in a complex manner. These influences can be long-lasting, superimposed, and strengthened. Daily discharge and nitrate nitrogen NO3--N concentrat...

Soil Hydrothermal Response to Seasonal Freeze–Thaw Processes in Low-Water-Content Sandy Gravel Deposits

Seasonal freeze–thaw processes affect soil hydrothermal conditions in high-altitude valleys, yet evaluations based only on air temperature or maximum freezing depth may overlook the distinction between surface-connected freezing and delayed thawing within the soil profile. Meteor...