424:
67:
51:
74:
461:). 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
289:
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
381:
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
414:
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.
409:
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
536:
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,
302:
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
683:
401:
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
702:
99:
357:
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
741:
687:
423:
66:
736:
709:
361:
is brought to the lake annually, of which more than half is released from lake sediments and the rest is derived from
35:
458:
596:
131:
342:, newly added flats, and some older buildings. Several residential areas surround the lake, including
349:
About 30% of the catchment area is settled land and two major traffic routes passes through the area.
406:
138:
572:
544:
294:
but failed to affect levels of nutrients and oxygen depletion in the bottom layers. Levels of
370:
258:
28:
319:
580:
548:
601:
521:
323:
50:
552:
448:
362:
159:
149:
730:
576:
564:
537:
529:
478:
474:
444:
432:
303:
517:
466:
462:
402:
398:
339:
318:
Along the shores of the lake is a park created on a flat terrain. Leading up to
568:
486:
436:
335:
307:
243:
206:
497:
482:
470:
454:
394:
358:
343:
291:
239:
142:
17:
114:
101:
584:
501:
327:
279:
492:
An inventory of lake bed fauna in 1997 produced a list of only 29 species/
556:
513:
451:
378:
366:
27:
For locality situated in Kalmar
Municipality, Kalmar County, Sweden, see
369:. Historically, the lake was flanked by small scale industries such as
560:
533:
383:
132:
509:
440:
299:
283:
525:
505:
493:
331:
543:
In early summer the lake is home to a number of birds including
411:
295:
275:
387:
374:
686:(in Swedish). Stockholm vatten. 2007-03-01. Archived from
651:
649:
647:
619:
617:
665:
663:
661:
516:treatment in 1986 didn't affect the populations of
249:
235:
231:
223:
215:
205:
197:
189:
181:
173:
169:
158:
148:
130:
91:
43:
405:with 9-14 per cent. Water from 200 metres of the
496:including most common species, mostly freshwater
290:resulted in a significant reduction in levels of
528:was introduced shortly after the treatment, and
92:
334:. On the eastern shore is a bathe next to the
708:(in Swedish). Stockholm vatten. Archived from
703:"Vattenprogram för Stockholm 2000 - Trekanten"
338:metro station, a bus terminal, the light rail
540:, and signal crayfish have been planted-out.
365:, which also contributes some 260 kg of
8:
559:. Other birds common to Stockholm, such as
40:
422:
613:
427:Lake Trekanten viewed from Liljeholmen.
322:on the southern side of the lake is a
7:
382:discontinued, in 1997 low levels of
587:have been documented by the lake.
25:
227:0.67 m (2 ft 2 in)
201:570,000 m (460 acreâ‹…ft)
73:
397:from parts of the traffic route
72:
65:
49:
575:, are found by the lake, while
222:
214:
204:
196:
188:
180:
172:
583:fish here during winters. No
473:found on the southern shore.
1:
524:still dominating the fauna.
219:1,690 m (5,540 ft)
758:
655:Vattenprogram, p 14.3-14.4
259:not a well-defined measure
36:Trekanten (disambiguation)
33:
26:
742:Lakes of Stockholm County
489:(uncommon to Stockholm).
271:
256:
193:7.0 m (23.0 ft)
60:
48:
386:and increased levels of
465:and the hybrid between
439:paired equal levels of
353:Environmental influence
185:4.3 m (14 ft)
177:13.5 ha (33 acres)
737:Geography of Stockholm
597:Geography of Stockholm
435:stock is dominated by
428:
154:60 ha (150 acres)
669:Vattenprogram, p 14.6
632:Vattenprogram, p 14.9
623:Vattenprogram, p 14.1
459:Ceratium hirundinella
426:
326:bluff with pines and
115:59.31167°N 18.01556°E
278:in southern-central
34:For other uses, see
579:visit the lake and
573:great crested grebe
447:, and a species of
207:Residence time
111: /
545:thrush nightingale
483:amphibious bistort
429:
120:59.31167; 18.01556
485:, and occasional
477:are dominated by
390:were documented.
330:trees, including
265:
264:
224:Surface elevation
55:View from Nybohov
29:Trekanten, Sweden
16:(Redirected from
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723:
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707:
698:
696:
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670:
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642:
639:
633:
630:
624:
621:
581:common merganser
549:common chaffinch
431:In late summer,
273:
257:Shore length is
134:
133:Primary outflows
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53:
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21:
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636:
631:
627:
622:
615:
610:
602:Lakes of Sweden
593:
522:signal crayfish
487:curled pondweed
479:white waterlily
421:
419:Flora and fauna
407:Liljeholmsvägen
355:
316:
162: countries
139:Liljeholmsviken
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39:
32:
23:
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15:
12:
11:
5:
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612:
611:
609:
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599:
592:
589:
553:garden warbler
475:Aquatic plants
420:
417:
363:surface runoff
354:
351:
315:
314:Catchment area
312:
263:
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237:
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229:
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150:Catchment area
146:
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95:
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71:
70:
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62:
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45:
24:
18:Lake Trekanten
14:
13:
10:
9:
6:
4:
3:
2:
754:
743:
740:
738:
735:
734:
732:
715:on 2007-09-27
711:
704:
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690:on 2007-09-27
689:
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629:
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586:
582:
578:
574:
570:
566:
565:Eurasian coot
562:
558:
554:
550:
546:
541:
539:
538:rainbow trout
535:
531:
530:northern pike
527:
523:
519:
515:
511:
507:
503:
499:
495:
490:
488:
484:
480:
476:
472:
468:
464:
460:
456:
453:
450:
446:
445:cyanobacteria
442:
438:
434:
433:phytoplankton
425:
418:
416:
413:
408:
404:
400:
396:
391:
389:
385:
380:
376:
372:
368:
364:
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352:
350:
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337:
333:
329:
325:
321:
313:
311:
309:
305:
301:
297:
293:
287:
285:
281:
277:
274:) is a small
269:
260:
255:
252:
248:
245:
241:
238:
234:
230:
226:
218:
210:
208:
200:
192:
184:
182:Average depth
176:
168:
164:
161:
157:
153:
151:
147:
144:
140:
137:
135:
129:
124:
96:
90:
68:
59:
52:
47:
42:
37:
30:
19:
717:. Retrieved
710:the original
692:. Retrieved
688:the original
637:
628:
542:
518:crucian carp
491:
467:white willow
463:crack willow
430:
403:heavy metals
399:Essingeleden
392:
356:
348:
317:
288:
272:The Triangle
267:
266:
216:Shore length
198:Water volume
174:Surface area
143:Lake Mälaren
684:"Trekanten"
569:tufted duck
437:green algae
336:Liljeholmen
308:Vinterviken
244:Liljeholmen
236:Settlements
118: /
93:Coordinates
731:Categories
719:2007-06-03
694:2007-06-03
677:References
585:amphibians
498:gastropods
471:bay willow
455:flagellate
395:stormwater
359:phosphorus
304:Ă…rstaviken
292:phosphorus
270:(English:
250:References
190:Max. depth
103:59°18′42″N
641:Trekanten
502:fireflies
371:tanneries
340:Tvärbanan
328:deciduous
280:Stockholm
268:Trekanten
106:18°0′56″E
80:Trekanten
44:Trekanten
591:See also
557:blackcap
514:rotenone
452:carapace
379:creosote
367:nitrogen
561:mallard
510:beetles
508:but no
506:leeches
449:eutroph
441:diatoms
393:Though
384:arsenic
344:Gröndal
320:Nybohov
240:Gröndal
211:3 years
571:, and
555:, and
504:, and
377:, and
300:copper
284:Sweden
165:Sweden
713:(PDF)
706:(PDF)
608:Notes
577:heron
534:roach
526:Perch
512:. A
332:hazel
324:fault
160:Basin
532:and
520:and
494:taxa
469:and
412:zinc
306:and
298:and
296:lead
276:lake
388:DDT
375:dye
733::
660:^
646:^
616:^
567:,
563:,
551:,
547:,
500:,
481:,
443:,
373:,
346:.
310:.
286:.
282:,
242:,
141:,
722:.
697:.
457:(
261:.
38:.
31:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
