The provided diagram illustrates the four distinct stages involved in the design and operation of a modern landfill for household waste. Overall, the process is characterised by a structured approach to site preparation, waste management, and final environmental sealing to ensure the containment of hazardous materials.
The first stage, construction, begins with the excavation of a large man-made hole into the natural rock foundation. Following this, the second phase involves lining the interior of the hole with layers of clay and a synthetic substance to prevent leakage. During this stage, a network of drainage pipes is installed at the base, leading to a central drainage tank to collect liquid waste.
In the third stage, the site is put into use as household waste is deposited into the lined cavity. As the waste accumulates, liquid byproducts are managed through the previously installed drainage system. Finally, the closure stage involves sealing the top of the landfill with a thick layer of clay. To complete the process, pipes are integrated into the structure to safely manage and extract gases generated by the decomposing waste, ensuring the site is securely contained within the natural rock environment.