Environmental Engineering FOURTH EDITION

474 ENVlRONMENTK ENGINEERING

Critical mass, 328
Critical time, 65
Cropland, sedimentation loading.

Curie, 3 18-320
Cut diameter, 392
Cyclones (air pollutant devices).

See Agriculture, sediment loading

See Control of airborne particulates,
cyclones
Cyclones (storms), 351-352

Darcy-Weisback head loss equation, 110,

dB, 427
dbA, 433434
dbN, 433434
DDT, 39,103
Deadheading, 256
Decay, radioactive, 3 13-3 16
Decibels, 426
Decomposers, 55,57,205
Decomposition. See Biodegradation
Denitrification, 197
Density of fluid, 121, 139
Deposition of air pollutants, 54,233,245,

Detention basins, 243,246

Detergents, 53,73, 103,233-234,245,

Diaphragm pumps, 129

Diesel engines, 333,369,404,406-407,

419

Diffusion

filtration process, 141-143

Dioxin. See TCDD

Disease vectors, 247,265,345

Disinfection byproducts, 76, 91, 103

Disinfection. See also Chlorine, 2,93,

Disintegration constant, 314,319

Dispersion of pollutants

143,224

333,369-371,385

247,401

102,150-151,230

atmospheric, 326,333,351-352,

horizontal, 352-355

vertical, 334,355-357

Displacement pump, 129

Dissolved organic carbon. See Carbon,

361-371,417

organic

Dissolved oxygen (DO). See also

Biochemical oxygen demand.

deoxygenation, 62-63

lakes, 71-73

measurement of, 81-84

reoxygenation, 62-63

sag curve, 61-66,85

water pollution, 21,52,57,68-69

Dissolved solids, 9695,233,242

Diversity of species index, 68-69

Domestic sewage, 88,155,167-169

Dose-response relationship, 3840,45

Drawdown, 112-115

Drinking water

disinfection, 2,91,100-101,151

hazardous waste, 297,336

quality measurement, 92

solid waste disposal, 251

10,51,75, 135,235,247,298

Drinking water. See also Water treatment,

Drought, 117-119

Dry weather flow, 53,154

Dumps, 115,259-260,263,265,345

Dust, 39,326,360,389,393-394,

397,421

Ecology, 1,4,5-7,20,303

aquatic, 54-57,72

Economic impact, 15-16,2428

Ecosystems, 554-56,75,414

Eddy current devices, 286

Effective dose equivalent, 320-321

Effective Perceived Noise Level

Effective stack height, 362,366-369

Efficiency curve, 131, 143

Effluent standards, 171-172

Electric cars, 407

Electrostatic precipitators. See Control of

risk assessment, 47

(EPNdB), 434

airborne particulates, electrostatic

precipitators

Emissions, atmospheric. See also

Radiation

incinerators, 229,288, 298,308,

measurement of, 375

regulation, 415-421

345-346

Endangered species, 303,342