Limpasan permukaan

Limpasan permukaan adalah aliran air yang mengalir di atas permukaan karena penuhnya kapasitas infiltrasi tanah. Limpasan merupakan unsur penting dalam siklus air dan salah satu penyebab erosi.

Limpasan yang muncul di permukaan sebelum mencapai saluran disebut sumber tidak langsung. Ketika limpasan mengalir di tanah, limpasan tersebut dapat mengambil kontaminan tanah seperti minyak bumi, pestisida, atau pupuk. Bila sumber tidak langsung mengandung kontaminan semacam itu, limpasan tersebut disebut polusi sumber tidak langsung.

Catatan kaki

Pranala luar 
 USDA NRCS National Engineering Handbook, Stage Discharge Relationships, Ch. 14 
 http://www.waterlog.info/software.htm provides free download of a conceptual model (RainOff) on rainfall-runoff relations based on a nonlinear reservoir.
 NutrientNet, an online nutrient trading tool developed by the World Resources Institute, designed to address water quality issues related to surface runoff and other pollution. See also the PA NutrientNet  website designed for Pennsylvania's nutrient trading program.
 Bioretention  as a low impact development method of treating surface runoff
 EPA Stormwater Permit Program 
 EPA - Menu of Stormwater Best Management Practices 
 Automatic Calibration of a Rainfall-Runoff Model Using a Fast and Elitist Multi-objective Particle Swarm Algorithm 
 Automatic calibration of a rapid flood spreading model using multiobjective optimisations
 Sensitivity analysis and automatic calibration of a rainfall-runoff model using multi-objectives

Hidrologi
Pencemaran air
Pencemaran tanah
Pencemaran samudra