China Institute of Water Resources and Hydropower Research

Impact of extreme rainstorm on the spatial distribution of population exposure in Haihe River basin in China

Abstract Based on daily rainfall data from 252 national meteorological stations in the Haihe River Basin of China during 1961–2023, rainstorm events were divided, and four characteristic variables representing the hazard index of rainstorms were statistically analyzed, including...

Effect of Blade Number on the Performance of a Small Francis Turbine for Rural Local Power Generation

The increasing integration of distributed photovoltaics and wind power in rural grids necessitates enhanced peak-regulation flexibility, for which small Francis turbines offer a promising solution. This study investigates the effect of long–short blade number on the hydraulic per...

Pollution assessment and source analysis of heavy metals and nutrients in sediments of Liujiaxia reservoir, upper Yellow River, China

Abstract To investigate the pollution characteristics, ecological risks, and sources of nutrients and heavy metals in the sediments of the Liujiaxia Reservoir, 21 surface sediment samples were collected in August 2025. Concentrations of total nitrogen (TN), total phosphorus (TP),...

Response of yield, water and fertilizer use efficiency of sweet potato to different drip fertigation regimes under mulching conditions in a humid region of East China

Developing precise irrigation and fertilization regimes is essential for sustaining sweet potato productivity, particularly in humid regions where rainfall variability complicates soil nutrient and water resource management. A two-year field experiment was conducted to investigat...

Response of Mechanical Properties in PVC-P GMB to Tensile Rate and Low Temperature

Plasticized polyvinyl chloride (PVC-P) geomembranes (GMBs) are widely used in cold regions as impervious barriers, facing combined low-temperature and variable loading effects. However, design specifications rely on room-temperature tests at fixed rates, not reflecting actual con...

A Two-Stage Machine Learning Framework for High-Resolution Multi-Source Precipitation Fusion in Complex Terrain: A Case Study of Shaoxing, China

High-resolution precipitation fields are essential for flash-flood forecasting and hydrological risk management, especially in small and medium-sized basins, yet single-source precipitation products often show limited accuracy over complex terrain. This study develops a two-stage...

Spatiotemporal Evolution and Driving Mechanisms of Soil Drought in the Haihe River Basin (2000–2022) Based on the Standardized Soil Moisture Index

Accurately depicting the spatiotemporal evolution patterns and driving mechanisms of soil drought is of great significance for regional agricultural drought warning and adaptive management of water resources. There are still shortcomings in the existing research in terms of indic...

Enhancing the WAS physical hydrological model and integrating machine learning and residual decomposition to improve runoff simulation performance in the cold region of the Taoerhe River Basin, Northeast China

Study region: The Taoerhe River Basin, located in Northeast China. Study focus: Physical hydrological models still have limitations in representing runoff processes in seasonally frozen semi-arid basins. This study improved runoff simulation through physical model modification an...