The design approach for the flood canal seems well-thought-out. Diverting water through a weir into two pathways based on rainfall intensity allows for adaptability during different flood conditions.

Below the 5-year flooding level, the water is directed along a branch line to a wetland area, serving as a means for natural purification and infiltration of the water.

For higher flood levels, the canal incorporates an overtopping mechanism at the diversion weir, diverting excess water to the river via a flood channel, for up to a 50-year return period.

Consideration of various flood levels (5-year, 30-year, and 50-year) is important for erosion control measures. Different design strategies, such as impervious concretion base for the 5-year flood, retaining walls along the slope for the 30-year flood, and pervious surface measures above that level due to low erosion risk, help meet the requirements of each flood level and velocity.

Overall, the design of the flood canal appears to account for ecological concerns, varying flood conditions, and the management of sedimentation and erosion.

During the initial phase of the project, a comprehensive urban flood risk map was created using GIS and HEC-RAS. This map encompasses both the river and the expansive Guyuan metropolitan area, spanning over 150 square kilometers. The model effectively captures crucial data points like flood velocity, inundation areas, duration, and other vital information, laying a strong foundation for informed decision-making and effective flood mitigation strategies.

The construction of infrastructure is accompanied by capacity building activities as well as extensive awareness campaigns to foster improved WASH knowledge and practices in healthcare with a focus on infection prevention and control (IPC) among staff, patients, and other relevant stakeholders. 

All parties must have a clear understanding of the requirements to keep new or rehabilitated sanitation facilities in a good state of repair and hygienically clean. For this reason, Sanitation for Millions offers a wide range of orientation and capacity building activities prior to and alongside any intervention. 

Developing the capacities of healthcare workers and decision takers to sustain WASH services and promote and practice good hygiene with a focus on IPC. Moreover, capacity building activities to ensure the sustainable operation and maintenance of the facilities are implemented. 

Access to safe WASH facilities, such as toilets and handwashing facilities, as well as to hospital waste management facilities is crucial to uphold hygiene and IPC practices in HCFs.