Lin S.D. Water and Wastewater Calculations Manual
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Wetlands (Cont.):
defined, 861
modified, 863
natural, 862
Wheat field, 855–861
Whole effluent toxicity, 580
WPA (Watershed protection approach), 146
Wuhrmann process (nitrogen removal), 769
Zeolites, 418, 438
Zinc, 557, 846, 853, 907
Zocloea, 714
Zone of capture (ZOC, groundwater),
183–184
Zones of influence (groundwater),
183–184
Zoogleoa, 727
Index 945