A5020304262- Water resources management and optimization
- Hydraulic flow and structures
- Water-Energy-Food Nexus Studies
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
The University of Tokyo
2020-2022
The best available high-resolution precipitation, GDP, freshwater and withdrawal data sets are used in a combined global analysis of physical economic water scarcity at 50 km resolution. We find that approximately 40.7 million people living areas with concurrent severe water-scarcity constraints. These mostly semi-arid parts Sub-Saharan Africa, the Middle East Central Asia.
Several bridge piers were visited, and their scour hole was characterized into three zones: scour, transition, mound zones. The observed onsite sorting scouring patterns recreated through flume experiments with varying pier aspect ratio (1:1, 1:2, 1:4 1:6) sediment geometric standard deviation (σg). showed that maximum depth decreased non-uniformity; 52.7 mm, 20.2 16.6 mm are the respective of beds σg = 1.4, 2.5, 5.2. While has minimal effect on values, it noticeable effects shape asymmetry....