There is usually wastewater from kitchens and toilets along with rainwater runoff. Priorities include sustainable drainage systems, recycling rainwater, green roofs and efficient waste management solutions. Plans will include methods for damming gullies and reducing rainwater runoff. It increases the permeability of the soil to rainwater, thus decreasing runoff. Qumran's water arrived perhaps twice a year from rainwater runoff. Rainfall is acidic because atmospheric carbon dioxide dissolves in the rainwater producing weak carbonic acid. Hollows in the rock surfaces provide catchments for rainwater. Some stations also provide facilities for rainwater harvesting. Places where seawater and rainwater is pumped away are included. They were particularly skillful in harvesting rainwater, agriculture and stone carving. It collects and funnels rainwater to a storage dam. Much of the rainwater Albuquerque receives does not recharge its aquifer. Low salinities can be caused by rainwater or river inputs of freshwater. Fitting its name, Bavikonda is a hill with wells for the collection of rainwater. Males emerge to call beside temporary rainwater streams.