The Assomption River (in French Rivière l'Assomption, named after the Assumption of Mary) is the most important waterway in the Lanaudière region of Quebec, Canada. It is over 200 kilometres (120 mi) long, and has a drainage basin (watershed) of 4,220 square kilometres (1,630 sq mi). Its source is the Mont Tremblant massif. Seven significant rivers flow into the Assomption (de la Boule, Versailles, Noire, la Chaloupe, Ouareau, Saint-Esprit, and Achigan) before it flows into the Rivière des Prairies at Repentigny, Quebec.
The L'Assomption River watershed overlaps two natural environments, the Laurentian Mountains and the St-Lawrence lowlands, which cover about a third of the watershed area. Its relief is a uniform plain with some hills—from 0 to 100 metres (0 to 328 ft)—dominated by agricultural lands. The texture of the soil is rather fine and rests on an impermeable argillaceous (clay) base.
The Laurentian Mountains form part of the Canadian Shield. They are separated from the lowlands by a well-defined escarpment that rises about 150 metres (490 ft). This escarpment has many waterfalls. The Laurentians Mountains have an average height of 230 metres (750 ft) in the south and 460 metres (1,510 ft) in the north. And there are even mountains of over 600 metres (2,000 ft) in the Mont Tremblant massif where the L'Assomption River forms.
Hydrographyedit
From north to south the average slope of the river decreases. The steeper slopes of the highlands create a fast current whereas the lowland flats produces a slower flow. Moreover, the river meanders a lot which is especially evident at the town of L'Assomption, almost completely surrounded by a large loop of the river.
The L'Assomption River watershed has 490 lakes of which 24 have a surface area larger than 1 square kilometre (250 acres). Most of the lakes are in the Laurentian highlands.
Water qualityedit
Urban and industrial pollutionedit
The water quality of the L'Assomption River is seriously affected by the area's social-economic conditions. Since 1950, the situation has been complicated by the urbanization of the river banks, by diversified agriculture, and by industrialisation along the southern portion of the river. Although the source of pollution has changed since 1950, because of strict environmental laws and the use of water purification equipment, water pollution is still not fully curbed.
Over 150,000 people live in the river's watershed in 43 municipalities, of which the most important are Repentigny, Joliette, Le Gardeur, and L'Assomption. In addition, the northern portion of the river's watershed is a popular vacation area, swelling the population by about 45,000 people during the vacation season.
The majority of the municipalities take their drinking water from the river and provide it to more than 100,000 people. The drinking water supply to other residences and country cottages, distributed over approximately 90 percent of the watershed area, comes from water wells.
Agricultural pollutionedit
Besides the urban and industrial pollution, agricultural pollution also contributes greatly to the environment's contamination.
Agriculture has a dominant position along the river: in 1995 there were 1,305 producers with 60,221 hectares (148,810 acres) under cultivation and possessing 73,563 animals.
Agricultural pollution takes several forms: direct pollution (discharge of manure directly in the rivers) and diffused pollution (infiltration of fertilizer products in the groundwater). Diffused pollution is difficult to control because it has a multitude of sources throughout the whole region. Yet without a solution to this problem the water quality of the river will never have the desired quality.
Wikimedia Commons has media related to Rivière L'Assomption.
Corporation de l'Aménagement de la Rivière l'Assomption
January 01, 1970
assomption, river, this, article, require, cleanup, meet, wikipedia, quality, standards, specific, problem, latitude, longitude, need, rounding, down, coords, more, realistic, values, 000001, millimetres, 000000000001, nanometres, please, help, improve, this, . This article may require cleanup to meet Wikipedia s quality standards The specific problem is latitude and longitude need rounding down per WP COORDS to more realistic values 0 000001 is 100 millimetres and 0 000000000001 is 100 nanometres Please help improve this article if you can April 2020 Learn how and when to remove this message The Assomption River in French Riviere l Assomption named after the Assumption of Mary is the most important waterway in the Lanaudiere region of Quebec Canada It is over 200 kilometres 120 mi long and has a drainage basin watershed of 4 220 square kilometres 1 630 sq mi Its source is the Mont Tremblant massif Seven significant rivers flow into the Assomption de la Boule Versailles Noire la Chaloupe Ouareau Saint Esprit and Achigan before it flows into the Riviere des Prairies at Repentigny Quebec L Assomption RiverRiviere L AssomptionAssomption River at Chutes Monte a Peine Park in Matawinie Regional County MunicipalityLocationCountryCanadaProvinceQuebecRegionLanaudierePhysical characteristicsSourceL Assomption Lake locationSaint Guillaume Nord coordinates46 27 45 N 74 03 16 W 46 46250 N 74 05444 W 46 46250 74 05444MouthRiviere des Prairies locationRepentigny coordinates45 42 52 N 73 28 51 W 45 71444 N 73 48083 W 45 71444 73 48083Length200 km 120 mi Discharge locationRiviere des Prairies About 150 000 people live in the drainage area of this river Contents 1 Geography 2 Hydrography 3 Water quality 3 1 Urban and industrial pollution 3 2 Agricultural pollution 3 3 Drainage basin watercourses 4 List of towns crossed 5 References 6 External linksGeography editThe L Assomption River watershed overlaps two natural environments the Laurentian Mountains and the St Lawrence lowlands which cover about a third of the watershed area Its relief is a uniform plain with some hills from 0 to 100 metres 0 to 328 ft dominated by agricultural lands The texture of the soil is rather fine and rests on an impermeable argillaceous clay base The Laurentian Mountains form part of the Canadian Shield They are separated from the lowlands by a well defined escarpment that rises about 150 metres 490 ft This escarpment has many waterfalls The Laurentians Mountains have an average height of 230 metres 750 ft in the south and 460 metres 1 510 ft in the north And there are even mountains of over 600 metres 2 000 ft in the Mont Tremblant massif where the L Assomption River forms Hydrography editFrom north to south the average slope of the river decreases The steeper slopes of the highlands create a fast current whereas the lowland flats produces a slower flow Moreover the river meanders a lot which is especially evident at the town of L Assomption almost completely surrounded by a large loop of the river The L Assomption River watershed has 490 lakes of which 24 have a surface area larger than 1 square kilometre 250 acres Most of the lakes are in the Laurentian highlands Water quality editUrban and industrial pollution edit The water quality of the L Assomption River is seriously affected by the area s social economic conditions Since 1950 the situation has been complicated by the urbanization of the river banks by diversified agriculture and by industrialisation along the southern portion of the river Although the source of pollution has changed since 1950 because of strict environmental laws and the use of water purification equipment water pollution is still not fully curbed Over 150 000 people live in the river s watershed in 43 municipalities of which the most important are Repentigny Joliette Le Gardeur and L Assomption In addition the northern portion of the river s watershed is a popular vacation area swelling the population by about 45 000 people during the vacation season The majority of the municipalities take their drinking water from the river and provide it to more than 100 000 people The drinking water supply to other residences and country cottages distributed over approximately 90 percent of the watershed area comes from water wells Agricultural pollution edit Besides the urban and industrial pollution agricultural pollution also contributes greatly to the environment s contamination Agriculture has a dominant position along the river in 1995 there were 1 305 producers with 60 221 hectares 148 810 acres under cultivation and possessing 73 563 animals Agricultural pollution takes several forms direct pollution discharge of manure directly in the rivers and diffused pollution infiltration of fertilizer products in the groundwater Diffused pollution is difficult to control because it has a multitude of sources throughout the whole region Yet without a solution to this problem the water quality of the river will never have the desired quality Drainage basin watercourses edit Order 1 Label Mouth Coordinates Length km Source Coordinates Region 1 L Assomption River Riviere des Prairies 45 42 52 N 73 28 51 W 45 71444444 N 73 48083333 W 45 71444444 73 48083333 L Assomption River 200 L Assomption Lake 46 27 45 N 74 03 16 W 46 4625 N 74 054444 W 46 4625 74 054444 L Assomption River source Lanaudiere 2 L Achigan River fr L Assomption River 45 50 26 N 73 26 45 W 45 84055 N 73 44583 W 45 84055 73 44583 L Achigan River 83 8 L Achigan Lake fr 45 55 26 N 73 57 03 W 45 923988 N 73 950733 W 45 923988 73 950733 L Achigan River source Lanaudiere 3 Jourdain River fr L Achigan River fr 45 49 54 N 73 51 31 W 45 831666666667 N 73 858611111111 W 45 831666666667 73 858611111111 Jourdain River 19 4 Duquette Lake 45 50 51 N 73 59 11 W 45 847596 N 73 986294 W 45 847596 73 986294 Jourdain River source Laurentides 4 Abercromby River fr L Achigan River fr 45 51 44 N 73 53 12 W 45 862222222222 N 73 886666666667 W 45 862222222222 73 886666666667 Abercromby River 10 8 Connely Lake 45 53 26 N 73 58 00 W 45 890648 N 73 96662 W 45 890648 73 96662 Abercromby River source Laurentides 5 Beauport River fr L Achigan River fr 45 53 23 N 73 52 08 W 45 889722222222 N 73 868888888889 W 45 889722222222 73 868888888889 Beauport River source 20 Lac de la Crosse 46 00 46 N 73 52 21 W 46 012824 N 73 872441 W 46 012824 73 872441 Beauport River source Laurentides 6 La Petite Riviere fr L Achigan River fr 45 51 03 N 73 46 17 W 45 850833333333 N 73 771388888889 W 45 850833333333 73 771388888889 La Petite Riviere 13 Saint Calixte 45 51 03 N 73 46 17 W 45 850909 N 73 771444 W 45 850909 73 771444 La Petite Riviere source Laurentides 7 Saint Esprit River fr L Assomption River 45 51 41 N 73 26 35 W 45 861388888889 N 73 443055555556 W 45 861388888889 73 443055555556 Saint Esprit River 90 4 Huard Lake 46 00 50 N 73 48 44 W 46 014012 N 73 812306 W 46 014012 73 812306 Saint Esprit River source Lanaudiere 8 Saint George Creek fr L Assomption River 45 54 13 N 73 26 13 W 45 9035 N 73 437 W 45 9035 73 437 Saint George Creek 19 2 Saint Alexis 45 54 13 N 73 26 13 W 45 9035 N 73 437 W 45 9035 73 437 Saint George Creek source Lanaudiere 9 Ouareau River L Assomption River 45 56 24 N 73 24 27 W 45 94 N 73 4075 W 45 94 73 4075 Ouareau River 80 Ouareau Lake fr 46 17 03 N 74 08 35 W 46 28416 N 74 14306 W 46 28416 74 14306 Ouareau River source Lanaudiere 10 Burton River fr Ouareau River 46 04 26 N 73 50 47 W 46 073888888889 N 73 846388888889 W 46 073888888889 73 846388888889 Burton River 16 9 Racette Lake 46 04 52 N 73 59 58 W 46 08123 N 73 999314 W 46 08123 73 999314 Burton River source LanaudiereLaurentides 11 Jean Venne River fr Ouareau River 46 06 08 N 73 51 27 W 46 102222222222 N 73 8575 W 46 102222222222 73 8575 Jean Venne River 20 9 Lac des Iles 46 06 45 N 74 01 13 W 46 112507 N 74 020144 W 46 112507 74 020144 Jean Venne River source Lanaudiere 12 Kenny River fr Jean Venne River fr 46 07 42 N 73 56 17 W 46 128333333333 N 73 938055555556 W 46 128333333333 73 938055555556 Kenny River 10 4 Heroux Lake 46 10 02 N 73 59 33 W 46 167139 N 73 992382 W 46 167139 73 992382 Kenny River source Lanaudiere 13 Beaulne River fr Ouareau River 46 12 14 N 73 54 05 W 46 203888888889 N 73 901388888889 W 46 203888888889 73 901388888889 Beaulne River 9 2 Beaulne Lake 46 11 37 N 74 00 13 W 46 193574 N 74 003582 W 46 193574 74 003582 Beaulne River source Lanaudiere 14 Dufresne River fr Ouareau River 46 15 55 N 73 59 16 W 46 265277777778 N 73 987777777778 W 46 265277777778 73 987777777778 Dufresne River 29 6 Dufresne Lake 46 12 09 N 74 13 13 W 46 202595 N 74 220213 W 46 202595 74 220213 Dufresne River source LanaudiereLaurentides 15 Rouge River fr Ouareau River 45 58 35 N 73 28 34 W 45 976388888889 N 73 476111111111 W 45 976388888889 73 476111111111 Rouge River 56 5 Couture Lake 46 10 19 N 73 46 53 W 46 172008 N 73 781444 W 46 172008 73 781444 Rouge River source Lanaudiere 16 Blanche River fr Rouge River fr 46 01 43 N 73 37 48 W 46 028611111111 N 73 63 W 46 028611111111 73 63 Blanche River 17 8 Lac des Francais fr 46 08 17 N 73 37 15 W 46 138178 N 73 620824 W 46 138178 73 620824 Blanche River source Lanaudiere 17 Le Grand Ruisseau fr Rouge River fr 46 01 05 N 73 32 39 W 46 018055555556 N 73 544166666667 W 46 018055555556 73 544166666667 Le Grand Ruisseau 15 1 Sainte Melanie 46 08 52 N 73 32 06 W 46 147722 N 73 534946 W 46 147722 73 534946 Le Grand Ruisseau source Lanaudiere 18 Trudel River fr Ouareau River 46 07 11 N 73 51 00 W 46 119722222222 N 73 85 W 46 119722222222 73 85 Trudel River 7 6 Chertsey Lake 46 07 56 N 73 48 52 W 46 132314 N 73 814338 W 46 132314 73 814338 Trudel River source Lanaudiere 19 Nord River fr Ouareau River 46 11 46 N 73 53 30 W 46 196111111111 N 73 891666666667 W 46 196111111111 73 891666666667 Nord River 6 5 Lac du Pin Rouge 46 14 22 N 73 52 57 W 46 239342 N 73 882407 W 46 239342 73 882407 Nord River source Lanaudiere 20 Versailles River fr L Assomption River 46 16 47 N 73 47 26 W 46 279722222222 N 73 790555555556 W 46 279722222222 73 790555555556 Versailles River 12 5 spring 46 15 22 N 73 53 56 W 46 256063 N 73 898856 W 46 256063 73 898856 Versailles River source Lanaudiere 21 Grande riviere Swaggin fr L Assomption River 46 19 16 N 73 50 31 W 46 321111111111 N 73 841944444444 W 46 321111111111 73 841944444444 Grande riviere Swaggin 8 7 Lac des Cedres 46 18 35 N 73 56 23 W 46 309754 N 73 939661 W 46 309754 73 939661 Grande riviere Swaggin source Lanaudiere 22 Petite riviere Swaggin fr Grande riviere Swaggin fr 46 19 07 N 73 51 27 W 46 318611111111 N 73 8575 W 46 318611111111 73 8575 Petite riviere Swaggin 12 6 Vauvert Lake 46 22 40 N 73 58 03 W 46 377806 N 73 967532 W 46 377806 73 967532 Petite riviere Swaggin source Lanaudiere 23 McGee River fr L Assomption River 46 22 13 N 73 52 54 W 46 370277777778 N 73 881666666667 W 46 370277777778 73 881666666667 McGee River 14 4 Marguerite Lake 46 23 58 N 74 03 24 W 46 399481 N 74 056659 W 46 399481 74 056659 McGee River source Lanaudiere 24 Lavigne River fr L Assomption River 46 23 02 N 73 53 50 W 46 383888888889 N 73 897222222222 W 46 383888888889 73 897222222222 Lavigne River 16 9 St Amour Lake 46 30 42 N 73 54 53 W 46 511624 N 73 914802 W 46 511624 73 914802 Lavigne River source Lanaudiere 25 Riviere de la Boule fr L Assomption River 46 16 23 N 73 45 29 W 46 273055555556 N 73 758055555556 W 46 273055555556 73 758055555556 Riviere de la Boule 14 7 Lare Lake 46 22 34 N 73 46 51 W 46 375985 N 73 780914 W 46 375985 73 780914 Riviere de la Boule source Lanaudiere 26 Noire River Matawinie fr L Assomption River 46 12 23 N 73 33 44 W 46 206388888889 N 73 562222222222 W 46 206388888889 73 562222222222 Noire River 52 6 Lemieux Lake 46 32 47 N 73 45 12 W 46 54639 N 73 75333 W 46 54639 73 75333 Noire River source Lanaudiere 27 Blanche River fr Noire River Matawinie fr 46 14 53 N 73 35 02 W 46 248055555556 N 73 583888888889 W 46 248055555556 73 583888888889 Blanche River 10 8 Lac a Canards 46 15 15 N 73 40 51 W 46 254216 N 73 680872 W 46 254216 73 680872 Blanche River source Lanaudiere 28 Leprohon River fr Noire River Matawinie fr 46 19 29 N 73 38 18 W 46 324722222222 N 73 638333333333 W 46 324722222222 73 638333333333 Leprohon River 16 small lake 46 20 57 N 73 44 09 W 46 349062 N 73 735735 W 46 349062 73 735735 Leprohon River source Lanaudiere 29 Crique a David fr Noire River Matawinie fr 46 18 51 N 73 29 04 W 46 314136 N 73 484489 W 46 314136 73 484489 Crique a David 17 Lac a la Pluie 46 25 12 N 73 38 01 W 46 420118 N 73 633728 W 46 420118 73 633728 Crique a David source Lanaudiere 30 Ruisseau du Point du Jour fr L Assomption River 45 50 12 N 73 24 56 W 45 836666666667 N 73 415555555556 W 45 836666666667 73 415555555556 Ruisseau du Point du Jour 20 6 Lanoraie 45 59 14 N 73 18 37 W 45 987099 N 73 310163 W 45 987099 73 310163 Ruisseau du Point du Jour source LanaudiereList of towns crossed edit nbsp The large meander of the L Assomption River at the Town of L Assomption Saint Come Quebec Saint Alphonse Rodriguez Quebec Sainte Beatrix Quebec Saint Jean de Matha Quebec Sainte Melanie Quebec Saint Felix de Valois Quebec Notre Dame des Prairies Quebec Saint Charles Borromee Quebec Joliette Quebec Saint Paul Quebec Saint Gerard Majella merged with L Assomption L Assomption Quebec Repentigny Quebec Le Gardeur Quebec merged with Repentigny Charlemagne QuebecReferences edit Ordered by right to left confluence External links editMap all coordinates using OpenStreetMap Download coordinates as KML GPX all coordinates GPX primary coordinates GPX secondary coordinates nbsp Wikimedia Commons has media related to Riviere L Assomption Corporation de l Amenagement de la Riviere l Assomption De l Outaragasipi a la Riviere l Assomption Retrieved from https en wikipedia org w index php title L 27Assomption River amp oldid 1174924708, wikipedia, wiki, book, books, library,
