The phrase "availability of drainage" is correct and usable in written English.
It can be used in contexts discussing infrastructure, environmental management, or construction, where the presence or accessibility of drainage systems is relevant.
Example: "The availability of drainage in the area is crucial to prevent flooding during heavy rainfall."
Alternatives: "drainage accessibility" or "drainage options".
The continued ability of suburban turtles to remain vagile without suffering from high mortality rates is likely a product of the availability of vegetated drainage lines and under-road "box" culverts that allow turtles to travel safely throughout the suburban landscape.
A stratified analysis was conducted by sex and a socioeconomic level index (SLI) was created using principal component analysis with the variables education, floor material in the dwelling, availability of potable water, drainage availability, owning a vehicle and owning domestic electronic equipment such as a television, video cassette recorder, gas stove and water heater.
The adolescents then used cameras attached to kites to gather aerial images, helping to identify the presence or absence of drainage systems, the availability of sanitation facilities, impediments to evacuation, and other issues.
Matters such as building form and orientation, nearby pollution sources, ambient air quality, groundwater levels, site drainage, and availability of or access to various energy sources (including renewable) can have implications for a successful design in the later stages.
Their model was able to estimate debris-flow run-out zones from easily measurable topographic parameters and the availability of loose sediments in the drainage basin.
However, it is important to note that we used explicit measurements of drainage class as our measure of site water availability rather than the approach of Hember et al. (2017) who used average long-term climactic water availability as measured by aridity index.
In the early 1980s, I studied the effect of drainage-diversions on the availability of water and the growth of desert shrubs, finding a 50% reduction in plant biomass downslope of these diversions.
During wet years, soil N availability was reduced by approximately 35 50 kg ha−1 compared to dry years, largely independent of drainage class.
Pollution in the Tigris river caused by the discharge of drainage water from agricultural areas and sewage discharge near Baghdad is a major constraint to freshwater availability in Iraq," says a recent Brookings Institute report.
The problem is essentially one of drainage.
