Knowledge (XXG)

Water aeration

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396:(more than 2mm in diameter), which release oxygen when they come into contact with the water, which also contributes to a mixing of the lake's stratified layers. With the release of large bubbles from the system, a turbulent displacement of water occurs which results in a mixing of the water. In comparison to other aeration techniques, coarse bubble aeration is very inefficient in the way of transferring oxygen. This is due to the large diameter and relatively small collective surface area of its bubbles. 1399: 319:
water surface. Floating surface aerators are also powered by on-shore electricity. The effectiveness of a surface aerator is limited to a small area as they are unable to add circulation or oxygen to much more than a 3-metre radius. This circulation and oxygenating is then limited to the uppermost portion of the water column, often leaving the bottom portions unaffected. Low speed surface aerators can also be installed on floats.
2107: 33: 2071: 303: 161: 2095: 295: 2083: 347:. Electricity forces the paddles to turn, churning the water and allowing oxygen transfer through air-water contact. As each new section of water is churned, it absorbs oxygen from the air and then, upon its return to the water, restores it to the water. In this regard paddlewheel aeration works very similarly to floating surface aerators. 490:
One commonly-used tool to reduce the severity of these lake management problems is to eliminate or lessen thermal stratification through aeration. Many types of aeration equipment have been used to reduce or eliminate thermal stratification. Aeration has met with some success, although it has rarely
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responsible for keeping the water clean. Historically the Bay's oyster population was in the tens of billions, and they circulated the entire Bay volume in a matter of days. Due to pollution, disease and over-harvesting their population is a fraction of historic levels. Water that was once clear for
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One of the drawbacks to fine bubble aeration is that the membranes of ceramic diffusers can sometimes clog and must be cleaned in order to keep them working at their optimum efficiency. Also, they do not possess the ability to mix the water column as well as other aeration techniques, such as coarse
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The low speed surface aerator is a device for biology aeration with high efficiency. These devices are often in steel protected by epoxy coating and generate high torque. The mixing of water volume is excellent. The common power is going from 1 up to 250kw per unit with an efficiency (SOE) around 2
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the plants provide the oxygen needed for underwater organisms to proliferate, and in exchange the filter feeders keep the water clean and thus clear enough for plants to have sufficient access to sunlight. Researchers have proposed oxygenation through artificial means as a solution to help improve
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Floating surface aerators work in a similar manner to fountains, but they do not offer the same aesthetic appearance. They extract water from the top 1–2 feet of the water body and utilize air-water contact to transfer oxygen. Instead of propelling water into the air, they disrupt the water at the
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Natural aeration is a type of both sub-surface and surface aeration. It can occur through sub-surface aquatic plants. Through the natural process of photosynthesis, water plants release oxygen into the water providing it with the oxygen necessary for fish to live and aerobic bacteria to break down
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and environmental managers have long been challenged by problems caused by thermal stratification of lakes. Fish die-offs have been directly associated with thermal gradients, stagnation, and ice cover. Excessive growth of plankton may limit the recreational use of lakes and the commercial use of
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Fine bubble diffused aeration is able to maximize the surface area of the bubbles and thus transfer more oxygen to the water per bubble volume. Additionally, smaller bubbles take more time to reach the surface so not only is the surface area maximized but so are the time each bubble spends in the
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are maintained at or above 5 mg/L. Compressed air is pumped, from five sites around the Bay, through a series of steel reinforced rubber pipelines, laid on the beds of the Bay and Rivers Taff and Ely. These are connected to approximately 800 diffusers. At times this is insufficient and the
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Fine bubble aeration is an efficient way to transfer oxygen to a water body. A compressor on shore pumps air through a hose, which is connected to an underwater aeration unit. Attached to the unit are a number of diffusers. These diffusers come in the shape of discs, plates, tubes or hoses
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defines a fine bubble as anything smaller than 2mm in diameter. This type of aeration has a very high oxygen transfer efficiency (OTE), sometimes as high as 15 pounds of oxygen / (horsepower * hour) (9.1 kilograms of oxygen / (kilowatt * hour)). On average, diffused air aeration diffuses
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Fountains are a popular method of providing surface aeration because of the aesthetic appearance that they offer. However, most fountains are unable to produce a large area of oxygenated water. Also, running electricity through the water to the fountain can be a safety hazard.
278:. The impeller pumps water from the first few feet of the water and expels it into the air. This process utilizes air-water contact to transfer oxygen. As the water is propelled into the air, it breaks into small droplets. Collectively, these small droplets have a large 405: 545:
stored in a tank. Liquid oxygen is passed through an electrically heated vapouriser and the gas is injected into a stream of water which is pumped from, and returned to, the bay. The barge is capable of dissolving up to 5 tonnes of oxygen in 24 hours.
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has been aerated using pipes since 2016. The system started as a large-bubble system intended mainly for de-stratification, creating a 74-ha oxic zone. It was upgraded in 2019 to fine-bubble injectors to provide more oxygen directly.
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or anoxic conditions, often caused by upstream human activities such as sewage discharges, agricultural run-off, or over-baiting a fishing lake. Aeration can be achieved through the infusion of air into the bottom of the
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to aerate as well as mix the water. Water displacement from the expulsion of bubbles will cause a mixing action to occur, and the contact between the water and the bubble will result in an oxygen transfer.
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which can use fine or coarse bubble aeration or mechanical aeration cones which draw up mixed liquor from the base of a treatment tank and eject it through the air where oxygen is entrained in the liquor.
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water-bodies seems an appealing solution and it has been tried successfully many times on freshwater ponds and small lakes. However no one has undertaken an aeration project as large as an
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but pollution and sediments have reduced the plant populations , resulting in a reduction of dissolved oxygen levels, rendering areas of the bay unsuitable for aerobic aquatic life. In a
331:(rearing aquatic animals or cultivating aquatic plants for food) field. Constructed of a hub with attached paddles, these aerators are usually powered by a tractor power take-off ( 563:
meters is now so turbid and sediment-ridden that a wader may lose sight of their feet before their knees are wet. Oxygen is normally supplied by submerged aquatic vegetation via
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are used to replenish oxygen levels, as part of an ongoing battle to clean up the river, which now supports 115 species of fish and hundreds more invertebrates, plants and birds.
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of water in both natural and artificial environments. Aeration techniques are commonly used in pond, lake, and reservoir management to address low oxygen levels or algal blooms.
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water, allowing it more opportunity to transfer oxygen to the water. As a general rule, smaller bubbles and a deeper release point will generate a greater oxygen transfer rate.
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Oxygen can be driven into the water when the wind disturbs the surface of the water body and natural aeration can also occur through a movement of water caused by an incoming
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Any procedure by which oxygen is added to water can be considered a type of water aeration. There are many ways to aerate water, but these all fall into two broad areas –
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help decompose organic matter. When oxygen concentrations become low, anoxic conditions may develop which can decrease the ability of the water body to support life.
434:(cubic feet of air per minute) (56.6-113.3 liters of air per minute), but some operate at levels as low as 1 cfm (28.3 L/min) or as high as 10 cfm (283 L/min). 426: 1159:
Lapham, Laura L.; Hobbs, Edward A.; Testa, Jeremy M.; Heyes, Andrew; Forsyth, Melinda K.; Hodgkins, Casey; Szewczyk, Curtis; Harris, Lora A. (11 August 2022).
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within a lake is often adversely affected by thermal stratification and in some cases may indirectly cause large die-offs of recreationally important fish.
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Paddlewheel aerators also utilize air-to-water contact to transfer oxygen from the air in the atmosphere to the water body. They are most often used in the
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through which oxygen can be transferred. Upon return, these droplets mix with the rest of the water and thus transfer their oxygen back to the ecosystem.
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kgO2/kw. Low speed aerator are used mostly for biology plant aeration for water purification. The higher the diameter, the higher the SOE and mixing.
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Fine bubble aeration is an efficient technique of aeration in terms of oxygen transfer due to the large collective surface area of its bubbles.
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A fountain consists of a means of squirting the water upwards into the air. Typically this may be done using a motor that powers a rotating
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or by surface agitation from a fountain or spray-like device to allow for oxygen exchange at the surface and the release of gasses such as
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Lackey, Robert T. (1972). "Response of Physical and Chemical Parameters to Eliminating Thermal Stratification in a Reservoir".
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Subsurface aeration seeks to release bubbles at the bottom of the water body and allow them to rise by the force of buoyancy.
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Typical mechanical surface aerator at work. It is often difficult for this type of machine to aerate the entire water column.
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In large water bodies in temperate climates, autumn turn-over can introduce oxygen rich water into the oxygen-poor
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processes use a variety of forms of aeration to support biological oxidative processes. A typical example is
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Lackey, Robert T. (1973). "Effects of Artificial Destratification on Zooplankton in Parvin Lake, Colorado".
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Lackey, Robert T.; Holmes, Donald W. (1972). "Evaluation of Two Methods of Aeration to Prevent Winterkill".
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Lackey, Robert T. (1973). "Bottom fauna changes during artificial reservoir destratification".
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Coarse bubble aeration is a type of subsurface aeration wherein air is pumped from an on-shore
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Lackey, Robert T. (1973). "Artificial reservoir destratification effects on phytoplankton".
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Lackey, Robert T. (1972). "A Technique for Eliminating Thermal Stratification in Lakes".
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Cooke, G. Dennis; Welch, Eugene B.; Peterson, Spencer; Nichols, Stanley A., eds. (2005).
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The Scientific and Technical Advisory Committee (STAC) of the Chesapeake Bay Program.
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also can be adversely affected. For fisheries managers, the spatial distribution of
404: 2021: 1965: 1894: 1786: 1721: 1666: 1593: 1428: 1328: 1258: 1248: 538: 513: 505: 392:. through a hose to a unit placed at the bottom of the water body. The unit expels 373: 302: 279: 755:. Southern Regional Aquaculture Center. SRAC Publication No. 3700. Archived from 2099: 2041: 1996: 1955: 1924: 1919: 1851: 1816: 1763: 1758: 1618: 1468: 1453: 1438: 1378: 1283: 533: 418: 328: 311: 160: 139: 777:"Modeling Wastewater Aeration Systems to Discover Energy Savings Opportunities" 2026: 1940: 1909: 1884: 1753: 1748: 1633: 1623: 1524: 1433: 1418: 1383: 1358: 1177: 1160: 336: 307: 294: 111:. A variety of techniques and technologies are available for both approaches. 17: 1960: 1864: 1811: 1613: 1554: 1534: 1529: 1486: 1463: 1368: 1318: 1313: 1187: 1085: 629: 568: 128: 998: 2046: 1859: 1544: 1373: 1363: 1338: 1308: 1288: 1268: 1238: 1089: 512:
levels plummeting and threatening the species it supports. Two dedicated
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lake water. With severe thermal stratification in a lake, the quality of
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where the principal problem is lack of filter-feeding organisms such as
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rate of the water and thus increase the salinity of the water body.
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Water aeration is often required in water bodies that suffer from
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During heavy rain, London's sewage storm pipes overflow into the
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Similar options have been proposed to help rehabilitate the
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Harbour Authority uses a mobile oxygenation barge built by
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10.1577/1548-8659(1973)102<450:EOADOZ>2.0.CO;2
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10.1577/1548-8640(1972)34[175:EOTMOA]2.0.CO;2
826:"Wastewater Technology Fact Sheet: Fine Bubble Aeration" 372:
Subsurface aeration can be accomplished by the use of
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paddlewheel aerator. The splashing may increase the
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Journal of the American Water Resources Association
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Journal of the American Water Resources Association
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Fountains aerate water by spraying it into the air.
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Archived from 770: 768: 766: 746: 744: 742: 740: 738: 736: 734: 640: 460:Circulators are commonly used to mix a 713:Brennan, Scott; Withgott, Jay (2005). 376:, which aspirate air, by means of the 820: 818: 7: 2082: 187:adding citations to reliable sources 2012:Controlled-environment agriculture 1165:Frontiers in Environmental Science 934:10.1111/j.1752-1688.1972.tb05181.x 700:10.1111/j.1752-1688.1972.tb05092.x 25: 1112:"Dissolved Oxygen in Cardiff Bay" 2105: 2093: 2081: 2070: 2069: 1397: 751:Tucker, Craig (September 2005). 159: 798:"Lake Aeration and Circulation" 952:The Progressive Fish-Culturist 1: 1139:"Can Windmills Save the Bay?" 343:. They tend to be mounted on 1976:Ultrasonic hydroponic fogger 1069:10.1016/0043-1354(73)90011-0 784:Process Energy Services, LLC 516:vessels, oxygenation barges 572:water quality. Aeration of 2150: 2007:Aquaculture of sea sponges 2065: 1728: 1395: 1178:10.3389/fenvs.2022.866152 875:Taparhudee, Wara (2002). 500:Thames oxygenation barges 357:Diffused aeration systems 290:Floating surface aerators 151:Low speed surface aerator 1389:Waste stabilization pond 592:Water treatment aeration 491:proved to be a panacea. 468:and thus reduce thermal 2017:Historical hydroculture 1875:Expanded clay aggregate 1822:Nutrient film technique 1733:Historical hydroculture 1086:"A tale of two rivers" 454:Lake de-stratification 409: 384:Coarse bubble aeration 315: 299: 37: 1837:Sub-irrigated planter 1344:Salt evaporation pond 446:Lake destratification 407: 305: 297: 35: 2002:Aquaculture of coral 1951:Irrigation sprinkler 1599:Big fish–little pond 1568:Freshwater ecosystem 1502:Puddles on a surface 508:, sending dissolved 495:Large-scale projects 400:Fine bubble aeration 323:Paddlewheel aerators 183:improve this section 87:Decreased levels of 1827:Organic hydroponics 1609:Constructed wetland 1061:1973WatRe...7.1349L 1026:1973TrAFS.102..450L 926:1972JAWRA...8..589L 692:1972JAWRA...8...46L 351:Subsurface aeration 131:, or even a strong 109:subsurface aeration 27:Adding air to water 1870:Diatomaceous earth 1797:Deep water culture 1492:Coffee ring effect 1299:Infiltration basin 1279:Facultative lagoon 775:Bolles, Steven A. 569:symbiotic relation 430:approximately 2–4 410: 316: 300: 120:excess nutrients. 38: 2121: 2120: 2037:Plant propagation 1946:Hydroponic dosers 1688: 1687: 1629:Pond of Abundance 1563:Aquatic ecosystem 854:www.clean-flo.com 442:bubble aeration. 263: 262: 255: 237: 45:oxygen saturation 16:(Redirected from 2141: 2109: 2097: 2085: 2084: 2073: 2072: 2052:Vertical farming 1990:Related concepts 1715: 1708: 1701: 1692: 1401: 1274:Evaporation pond 1212: 1205: 1198: 1189: 1183: 1182: 1180: 1156: 1150: 1149: 1143: 1134: 1128: 1127: 1125: 1123: 1108: 1102: 1101: 1099: 1097: 1082: 1073: 1072: 1055:(9): 1349–1356. 1044: 1038: 1037: 1009: 1003: 1002: 974: 968: 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1170: 1166: 1162: 1155: 1152: 1147: 1140: 1133: 1130: 1117: 1113: 1107: 1104: 1091: 1087: 1081: 1079: 1075: 1070: 1066: 1062: 1058: 1054: 1050: 1043: 1040: 1035: 1031: 1027: 1023: 1019: 1015: 1008: 1005: 1000: 996: 992: 988: 984: 980: 973: 970: 965: 961: 957: 953: 946: 944: 940: 935: 931: 927: 923: 919: 915: 908: 906: 902: 889: 885: 878: 871: 868: 855: 851: 845: 842: 834: 827: 821: 819: 815: 799: 793: 790: 785: 778: 771: 769: 767: 763: 758: 754: 747: 745: 743: 741: 739: 737: 735: 731: 726: 724:0-8053-4427-6 720: 716: 709: 706: 701: 697: 693: 689: 685: 681: 674: 672: 670: 666: 661: 659:9781566706254 655: 651: 644: 641: 635: 631: 628: 626: 623: 621: 620:Aerated water 618: 616: 613: 612: 608: 606: 603: 599: 591: 589: 586: 581: 579: 575: 570: 566: 561: 557: 549: 547: 544: 543:liquid oxygen 540: 535: 527: 525: 523: 519: 515: 511: 507: 499: 494: 492: 488: 486: 482: 477: 473: 471: 467: 463: 458: 457: 455: 445: 443: 439: 435: 433: 428: 424: 420: 416: 406: 399: 397: 395: 391: 383: 381: 379: 375: 367: 365: 362: 358: 350: 348: 346: 342: 338: 334: 330: 322: 320: 313: 309: 304: 296: 289: 287: 283: 281: 277: 269: 267: 257: 254: 246: 243:February 2024 235: 232: 228: 225: 221: 218: 214: 211: 207: 204: –  203: 199: 198:Find sources: 192: 188: 184: 178: 177: 173: 168:This section 166: 162: 157: 156: 150: 145: 143: 141: 136: 134: 130: 126: 121: 114: 112: 110: 106: 98: 96: 94: 90: 85: 83: 79: 75: 71: 67: 63: 58: 51:Water quality 50: 48: 46: 42: 34: 30: 19: 18:Aerated water 2110: 2098: 2086: 2074: 2056: 2022:Hydroponicum 1966:Spray nozzle 1895:Mineral wool 1807:Ebb and flow 1722:Hydroculture 1673:Water Lilies 1672: 1667:Water garden 1661: 1647:(M C Escher) 1644: 1594:Bakki shower 1429:Natural pool 1329:Raceway pond 1259:Cooling pond 1249:Ballast pond 1168: 1164: 1154: 1145: 1132: 1120:. Retrieved 1116:the original 1106: 1096:13 September 1094:. Retrieved 1052: 1048: 1042: 1017: 1013: 1007: 982: 978: 972: 955: 951: 917: 913: 892:. Retrieved 887: 883: 870: 858:. Retrieved 853: 844: 833:the original 807:13 September 805:. Retrieved 792: 783: 757:the original 714: 708: 686:(1): 46–49. 683: 679: 649: 643: 595: 582: 553: 539:McTay Marine 531: 521: 517: 514:McTay Marine 506:River Thames 503: 489: 474: 459: 451: 449: 440: 436: 423:fine bubbles 422: 411: 393: 387: 374:jet aerators 371: 368:Jet aeration 356: 354: 326: 317: 284: 280:surface area 273: 264: 249: 240: 230: 223: 216: 209: 197: 181:Please help 169: 137: 122: 118: 108: 104: 102: 86: 54: 40: 39: 29: 2112:Wikiversity 2042:Rhizosphere 1997:Algaculture 1956:Leaf sensor 1934:Accessories 1920:Vermiculite 1817:Microponics 1764:Hydroponics 1759:Aquascaping 1619:Hydric soil 1507:Seep puddle 1469:Vernal pool 1454:Stream pool 1439:Plunge pool 1304:Kettle pond 1284:Garden pond 860:25 February 534:Cardiff Bay 528:Cardiff Bay 329:aquaculture 312:evaporation 140:hypolimnion 2027:Paludarium 1941:Grow light 1925:Wood fibre 1910:Rice hulls 1885:Growstones 1852:Substrates 1754:Aquaponics 1749:Aeroponics 1634:Pond liner 1624:Phytotelma 1555:Ecosystems 1525:Beaver dam 1434:Ocean pool 1419:Brine pool 1384:Waste pond 1359:Solar pond 958:(3): 175. 636:References 585:Rock Creek 337:gas engine 308:horsepower 213:newspapers 2100:Wikibooks 1890:Lava rock 1865:Coco peat 1812:Fogponics 1614:Full pond 1535:Fish pond 1530:Duck pond 1487:Bird bath 1464:Tide pool 1369:Stew pond 1319:Mill pond 1314:Melt pond 1122:7 October 890:: 408–419 630:Limnology 452:See also 270:Fountains 170:does not 129:waterfall 2128:Category 2076:Category 2047:Root rot 1860:Charcoal 1842:Top drip 1780:Subtypes 1545:Koi pond 1374:Tailings 1364:Stepwell 1339:Sag pond 1309:Log pond 1289:Ice pond 1269:Dew pond 1239:Ash pond 1090:BBC News 991:25037806 894:26 April 609:See also 359:utilize 339:, or an 276:impeller 2088:Commons 1961:Net-pot 1900:Perlite 1769:passive 1675:(Monet) 1639:Ponding 1582:Related 1479:Puddles 1223:puddles 1057:Bibcode 1022:Bibcode 999:4697461 922:Bibcode 688:Bibcode 578:estuary 574:hypoxic 560:oysters 415:ceramic 378:Venturi 361:bubbles 227:scholar 191:removed 176:sources 78:methane 57:hypoxic 1971:Timers 1905:Pumice 1880:Gravel 1652:Spring 1645:Puddle 1497:Puddle 997:  989:  856:. 2023 721:  656:  510:oxygen 425:. The 345:floats 306:A one- 229:  222:  215:  208:  200:  125:stream 66:lagoon 1742:Types 1517:Biome 1407:Pools 1231:Ponds 1219:Ponds 1142:(PDF) 987:JSTOR 880:(PDF) 836:(PDF) 829:(PDF) 801:(PDF) 780:(PDF) 596:Many 541:with 335:), a 234:JSTOR 220:books 133:flood 1915:Sand 1680:Well 1379:Tarn 1254:Beel 1124:2010 1098:2009 995:PMID 896:2020 862:2024 809:2009 719:ISBN 654:ISBN 520:and 485:fish 466:lake 462:pond 206:news 174:any 172:cite 107:and 70:pond 62:lake 1173:doi 1065:doi 1030:doi 1018:102 960:doi 930:doi 696:doi 464:or 432:cfm 427:EPA 333:PTO 185:by 80:or 68:or 2130:: 1171:. 1169:10 1167:. 1163:. 1144:. 1088:. 1077:^ 1063:. 1051:. 1028:. 1016:. 993:. 983:45 981:. 956:34 954:. 942:^ 928:. 916:. 904:^ 888:36 886:. 882:. 852:. 817:^ 782:. 765:^ 733:^ 694:. 682:. 668:^ 580:. 142:. 135:. 127:, 84:. 76:, 64:, 1714:e 1707:t 1700:v 1211:e 1204:t 1197:v 1181:. 1175:: 1148:. 1126:. 1100:. 1071:. 1067:: 1059:: 1053:7 1036:. 1032:: 1024:: 1001:. 966:. 962:: 936:. 932:: 924:: 918:8 898:. 864:. 811:. 786:. 727:. 702:. 698:: 690:: 684:8 662:. 456:) 450:( 256:) 250:( 245:) 241:( 231:· 224:· 217:· 210:· 193:. 179:. 20:)

Index

Aerated water

oxygen saturation
hypoxic
lake
lagoon
pond
carbon dioxide
methane
hydrogen sulfide
dissolved oxygen
aerobic bacteria
stream
waterfall
flood
hypolimnion

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