The invention provides a building method which combines centralized drinking water head site plane source
pollution prevention and control in mountainous areas with drinking water
engineering, comprising the following steps: (1) adopting an
intercropping or interplanting mode to
plant mountainous crops; (2) utilizing fertilization technology to save
nitrogen, control phosphorous and improve
soil organic matter; (3) building 3-6 levels of
plant hedges in equal distance and equal height from the
summit to the foot of the mountain; (4) building an ecological
ditch: placing a
composite substrate adsorption dam at the bottom of the
ditch, planting large-size aquatic plants on the
ditch bank, and arranging a valve at the outlet end of the ditch; (5) building a biological
pool: the depth of the water in the
pool is not less than 2.5m, the biological
pool is provided with valves for
water intake and
discharge, and planting large-size aquatic plants in the area of the biological pool close to the river
bank and the side slope of the pool; (6) building a
soil infiltration system: selecting a position which is within 100m from the biological pool to build the
soil infiltration system, wherein the discharged water directly enters the
soil infiltration system; (7) building a collector well; and (8) building an impounding reservoir at a certain height. The invention is simple and practicable, has good effects on preventing and controlling the water head site plane source
pollution, is convenient to promote, and simultaneously solves the problem of difficulty in drinking water in poor mountainous areas for thousands of years.