Modeling phosphorus removal in wet ponds with filter zones containing sand or crushed concrete

摘要: Abstract Generally, wet ponds are constructed only to reduce the hydraulic load of downstream receiving water bodies. Often most particulate matter will be retained, whereas dissolved nutrients mostly unaffected by pond due short retention times. A suite lab-experiments have demonstrated that crushed concrete has high affinity for phosphorus (TDP), and potentially could an effective new measure discharge (P) located P-limited lakes estuaries. To verify this potential we developed a dynamic model combined sedimentation infiltration in Denmark, using software PowerSim. The simulates P suspended (SPM). It is possible change description filter material either traditional sand or concrete, thereby demonstrate P-retention efficiency different materials. Two scenarios with changing volume storage indicated 400 50 m 3  pr. reduced hectare (red. ha), respectively, would optimal particles. In combination result, showed significant increase TDP (≈60%) compared (≈10%). This applies actually percolating through filters not overflow. Because alkaline material, pH body (>9.5) approximately 100 days then decrease neutral. If adequate precautions against put place, can sensitive