Sanitary landfill for domestic waste means a waste disposal site used for the treatment and disposal of municipal domestic waste with an artificial impermeable membrane to prevent the leakage of waste leachate, with leachate treatment or pre-treatment facilities and equipment, operation, management and maintenance, and eventual closure of the site to meet the health requirements.

Cisterns are water storage facilities constructed with artificial materials and with impermeability, and are important engineering facilities for important rainwater storage. Lack of freshwater resources, water pollution and ecological deterioration to a certain extent restricts the socio-economic development, cisterns as a low-cost water conservation system, effectively alleviate the shortage of water resources, solve the urban flood control and drainage problems.

The role of geomembranes laid in cisterns is mainly in the following aspects:

  1. Preventing seepage: geomembrane has excellent seepage resistance, which can effectively block the seepage of water and ensure the water storage function of the cistern.
  2. Improve the efficiency of water storage: geomembrane can reduce the loss of water in the soil, maintain the stability and continuity of the water source in the reservoir, and improve the efficiency of water storage.
  3. Prevent soil erosion: geomembrane can block rainwater scouring and soil erosion, reduce the damage to the soil around the cistern, and protect the water quality and water environment.
  4. Enhancement of structural stability: geomembrane can increase the structural stability of the cistern, avoiding soil liquefaction and landslides caused by water leakage, and prolonging the service life of the cistern.
  5. Preventing root infiltration and biological invasion: geomembranes can also play a role in preventing plant root infiltration and aquatic organisms from invading and protecting the internal facilities of the reservoir from damage.
  6. In short, laying geomembrane can improve the seepage control performance of the cistern, protect the environment and facilities, improve the efficiency of water resources utilization and extend the service life.