413:
56:
40:
63:
450:). Several of the blue green algae present in the lake are potentially poisonous and, notwithstanding non-alarming levels, therefore carefully monitored near the bathe. Lacking soft and shallow bottom areas near the shore, the lake contains only commonplace vegetation, save for the population of
278:
Trekanten is located in a park furnished with an artificial bathing beach and various planted-out fish species. It has a small drainage area with no major feeders. In the early 1980s, potable water was poured into the lake while water from the bottom of the lake was pumped out. These operations
370:
works and until the early 1960s sewage and overflow water was guided into the lake. During the past 20 years, however, airing of bottom layers coupled with addition of potable water have improved the state of the lake. While the affected terrain has been restored since the operations were
403:
brought to the lake is believed to come from car tyres and about 18 per cent from settlements, while copper roofs, formerly abundant around the lake but mostly replaced by asphalt today, are thought to cause most of the copper.
398:
traffic route (45,000 vehicles/day) is still led untreated into the lake. Thus, while surrounding blocks of flats are believed to contribute with most of the phosphorus and nitrogen, an estimated fourth of the
525:
is believed to have found their way into the lake by themselves. Crucian carps are decimated by trawling annually and the population of roach has increased considerably since 2001. Carp,
291:
are among the highest documented in any lake in
Stockholm. Whilst the lake flora and fauna is roughly representative for Stockholm, the lake forms a natural link between the bays
672:
390:
has been redirected elsewhere, water from a 300 metres long viaduct is still brought into the lake via a water treatment plant lessening oil levels with some 10 per cent and
691:
88:
346:
In an old industrial area north of the lake is a timber trade, the only remaining polluting operation in the catchment area. About 60 kg of
730:
676:
412:
55:
725:
698:
350:
is brought to the lake annually, of which more than half is released from lake sediments and the rest is derived from
24:
447:
585:
120:
331:, newly added flats, and some older buildings. Several residential areas surround the lake, including
338:
About 30% of the catchment area is settled land and two major traffic routes passes through the area.
395:
127:
561:
533:
283:
but failed to affect levels of nutrients and oxygen depletion in the bottom layers. Levels of
359:
247:
17:
308:
569:
537:
590:
510:
312:
39:
541:
437:
351:
148:
138:
719:
565:
553:
526:
518:
467:
463:
433:
421:
292:
506:
455:
451:
391:
387:
328:
307:
Along the shores of the lake is a park created on a flat terrain. Leading up to
557:
475:
425:
324:
296:
232:
195:
486:
471:
459:
443:
383:
347:
332:
280:
228:
131:
103:
90:
573:
490:
316:
268:
481:
An inventory of lake bed fauna in 1997 produced a list of only 29 species/
545:
502:
440:
367:
355:
16:
For locality situated in Kalmar
Municipality, Kalmar County, Sweden, see
358:. Historically, the lake was flanked by small scale industries such as
549:
522:
372:
121:
498:
429:
288:
272:
514:
494:
482:
320:
532:
In early summer the lake is home to a number of birds including
400:
284:
264:
376:
363:
675:(in Swedish). Stockholm vatten. 2007-03-01. Archived from
640:
638:
636:
608:
606:
654:
652:
650:
505:treatment in 1986 didn't affect the populations of
238:
224:
220:
212:
204:
194:
186:
178:
170:
162:
158:
147:
137:
119:
80:
32:
394:with 9-14 per cent. Water from 200 metres of the
485:including most common species, mostly freshwater
279:resulted in a significant reduction in levels of
517:was introduced shortly after the treatment, and
81:
323:. On the eastern shore is a bathe next to the
697:(in Swedish). Stockholm vatten. Archived from
692:"Vattenprogram för Stockholm 2000 - Trekanten"
327:metro station, a bus terminal, the light rail
529:, and signal crayfish have been planted-out.
354:, which also contributes some 260 kg of
8:
548:. Other birds common to Stockholm, such as
29:
411:
602:
416:Lake Trekanten viewed from Liljeholmen.
311:on the southern side of the lake is a
7:
371:discontinued, in 1997 low levels of
576:have been documented by the lake.
14:
216:0.67 m (2 ft 2 in)
190:570,000 m (460 acreâ‹…ft)
62:
386:from parts of the traffic route
61:
54:
38:
564:, are found by the lake, while
211:
203:
193:
185:
177:
169:
161:
572:fish here during winters. No
462:found on the southern shore.
1:
513:still dominating the fauna.
208:1,690 m (5,540 ft)
747:
644:Vattenprogram, p 14.3-14.4
248:not a well-defined measure
25:Trekanten (disambiguation)
22:
15:
731:Lakes of Stockholm County
478:(uncommon to Stockholm).
260:
245:
182:7.0 m (23.0 ft)
49:
37:
375:and increased levels of
454:and the hybrid between
428:paired equal levels of
342:Environmental influence
174:4.3 m (14 ft)
166:13.5 ha (33 acres)
726:Geography of Stockholm
586:Geography of Stockholm
424:stock is dominated by
417:
143:60 ha (150 acres)
658:Vattenprogram, p 14.6
621:Vattenprogram, p 14.9
612:Vattenprogram, p 14.1
448:Ceratium hirundinella
415:
315:bluff with pines and
104:59.31167°N 18.01556°E
267:in southern-central
23:For other uses, see
568:visit the lake and
562:great crested grebe
436:, and a species of
196:Residence time
100: /
534:thrush nightingale
472:amphibious bistort
418:
109:59.31167; 18.01556
474:, and occasional
466:are dominated by
379:were documented.
319:trees, including
254:
253:
213:Surface elevation
44:View from Nybohov
18:Trekanten, Sweden
738:
712:
710:
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703:
696:
687:
685:
684:
659:
656:
645:
642:
631:
628:
622:
619:
613:
610:
570:common merganser
538:common chaffinch
420:In late summer,
262:
246:Shore length is
123:
122:Primary outflows
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98:
97:
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83:
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58:
42:
30:
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663:
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648:
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629:
625:
620:
616:
611:
604:
599:
591:Lakes of Sweden
582:
511:signal crayfish
476:curled pondweed
468:white waterlily
410:
408:Flora and fauna
396:Liljeholmsvägen
344:
305:
151: countries
128:Liljeholmsviken
108:
106:
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89:
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45:
28:
21:
12:
11:
5:
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646:
632:
623:
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588:
581:
578:
542:garden warbler
464:Aquatic plants
409:
406:
352:surface runoff
343:
340:
304:
303:Catchment area
301:
252:
251:
243:
242:
240:
236:
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226:
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139:Catchment area
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117:
116:
84:
78:
77:
68:
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60:
59:
53:
52:
51:
50:
47:
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35:
34:
13:
10:
9:
6:
4:
3:
2:
743:
732:
729:
727:
724:
723:
721:
704:on 2007-09-27
700:
693:
689:
679:on 2007-09-27
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665:
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589:
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584:
583:
579:
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571:
567:
563:
559:
555:
554:Eurasian coot
551:
547:
543:
539:
535:
530:
528:
527:rainbow trout
524:
520:
519:northern pike
516:
512:
508:
504:
500:
496:
492:
488:
484:
479:
477:
473:
469:
465:
461:
457:
453:
449:
445:
442:
439:
435:
434:cyanobacteria
431:
427:
423:
422:phytoplankton
414:
407:
405:
402:
397:
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389:
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365:
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353:
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341:
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318:
314:
310:
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290:
286:
282:
276:
274:
270:
266:
263:) is a small
258:
249:
244:
241:
237:
234:
230:
227:
223:
219:
215:
207:
199:
197:
189:
181:
173:
171:Average depth
165:
157:
153:
150:
146:
142:
140:
136:
133:
129:
126:
124:
118:
113:
85:
79:
57:
48:
41:
36:
31:
26:
19:
706:. Retrieved
699:the original
681:. Retrieved
677:the original
626:
617:
531:
507:crucian carp
480:
456:white willow
452:crack willow
419:
392:heavy metals
388:Essingeleden
381:
345:
337:
306:
277:
261:The Triangle
256:
255:
205:Shore length
187:Water volume
163:Surface area
132:Lake Mälaren
673:"Trekanten"
558:tufted duck
426:green algae
325:Liljeholmen
297:Vinterviken
233:Liljeholmen
225:Settlements
107: /
82:Coordinates
720:Categories
708:2007-06-03
683:2007-06-03
666:References
574:amphibians
487:gastropods
460:bay willow
444:flagellate
384:stormwater
348:phosphorus
293:Ă…rstaviken
281:phosphorus
259:(English:
239:References
179:Max. depth
92:59°18′42″N
630:Trekanten
491:fireflies
360:tanneries
329:Tvärbanan
317:deciduous
269:Stockholm
257:Trekanten
95:18°0′56″E
69:Trekanten
33:Trekanten
580:See also
546:blackcap
503:rotenone
441:carapace
368:creosote
356:nitrogen
550:mallard
499:beetles
497:but no
495:leeches
438:eutroph
430:diatoms
382:Though
373:arsenic
333:Gröndal
309:Nybohov
229:Gröndal
200:3 years
560:, and
544:, and
493:, and
366:, and
289:copper
273:Sweden
154:Sweden
702:(PDF)
695:(PDF)
597:Notes
566:heron
523:roach
515:Perch
501:. A
321:hazel
313:fault
149:Basin
521:and
509:and
483:taxa
458:and
401:zinc
295:and
287:and
285:lead
265:lake
377:DDT
364:dye
722::
649:^
635:^
605:^
556:,
552:,
540:,
536:,
489:,
470:,
432:,
362:,
335:.
299:.
275:.
271:,
231:,
130:,
711:.
686:.
446:(
250:.
27:.
20:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
