Statistical Analysis of Stream Events as Applied to Controlled Release of Lagoon Effluents

摘要

High construction and operating costs of alternative waste treatment processes dictate the retention of lagoons as a waste management alternative fo small towns with less than 2 mgd flow and for towns located on 'water quality limited' stream segments. Retention of lagoons is possible provided secondary treatment standards and stream quality criteria are met. The first criteria is met by lagoon design and the second can be met by discharge of the effluent during stream events. An event is defined as a maximum on the hydrograph irrespective of magnitude or time of occurrence. This research is an attempt to establish the methodology applicable to the hydrologic design of waste discharge into natural streams with characteristic rise and fall of a stochastic nature. Based on this return period the size of a storage system can be determined for given volumetric inflow rates.