If you're thinking about buying a retractable awning, consider the value, longevity and cost. Purchasing a retractable deck awning is a big investment. While smaller, less-expensive awnings start at around $500, larger, higher-quality awnings can cost as much as $2,000 or more. Before you make the decision to buy a retractable awning, you should learn as much as possible about their benefits and drawbacks. Here are the top three pros and cons to consider.
Drainage basin. 558 pages on this wiki. A drainage basin is the area within the drainage basin divide (yellow outline), and drains the surface runoff and river discharge (blue lines) of a contiguous area.rainage basin. 558 pages on this wiki. A drainage basin is the area within the drainage basin divide (yellow outline), and drains the surface runoff and river discharge (blue lines) of a contiguous area.
Catchments, Rivers and Waterways. A catchment is the area of land that drains into a canal, creek or river system. In a catchment, all rain and run-off water eventually flows to a creek, river, lake or ocean, or into the groundwater system. We all live, work and play in catchments, and it is important to remember that our actions can have an impact on a waterway, even if it is several kilometres away.