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1 Over the upstream part of the Mastigouche watershed, which is mainly forested, the following Horton infiltration characteristics are found: fo=43.7 mm/hr and fe= 23.4
1 Over the upstream part of the Mastigouche watershed, which is mainly forested, the following Horton infiltration characteristics are found: fo=43.7 mm/hr and fe= 23.4 mm/hr, with a decay constant (k) of 1.5 a) Plot the infiltration rate curve for a duration of 25 hours b) Compare the hyetograph for the rain event of April 29-30 (Excel file Rain April 29-30 St-Charles-de-Mandeville) to this infiltration curve. Be careful with time units as rain data (provided by the MELCC) are for 15-minute periods. Would there be any Hortonian runoff in this case? Justify your answer. c) Use the Summary information for the month of April 2018 (pdf file Rain April_StCharles-de-Mandeville) to discuss the possible reasons why this rain event resulted in such a high discharge (note: Pluie = rain; Neige = snow) Rain (mm) 0.4 0.2 0.2 0.2 0.4 0.4 0.2 0.2 0 0.2 0 0 Date 29/04/2018 9:30 29/04/2018 9:45 29/04/2018 10:00 29/04/2018 10:15 29/04/2018 10:30 29/04/2018 10:45 29/04/2018 11:00 29/04/2018 11:15 29/04/2018 11:30 29/04/2018 11:45 29/04/2018 12:00 29/04/2018 12:15 29/04/2018 12:30 29/04/2018 12:45 29/04/2018 13:00 29/04/2018 13:15 29/04/2018 13:30 29/04/2018 13:45 29/04/2018 14:00 29/04/2018 14:15 29/04/2018 14:30 29/04/2018 14:45 29/04/2018 15:00 29/04/2018 15:15 29/04/2018 15:30 29/04/2018 15:45 29/04/2018 16:00 29/04/2018 16:15 0.2 0 0.2 0.4 0.2 0.2 0.2 0.2 0.4 0.2 0.2 0.2 0.2 0.6 0.4 0.2 0.4 0.2 0.2 10.2 0 0 02 0.2 0 0 0.2 0 0.2 0.2 0 0 0 0.2 02 0.4 0.8 29/04/2018 16:30 29/04/2018 16:45 29/04/2018 17:00 29/04/2018 17:15 29/04/2018 17:30 29/04/2018 17:45 29/04/2018 18:00 29/04/2018 18:15 29/04/2018 18:30 29/04/2018 18:45 29/04/2018 19:00 29/04/2018 19:15 29/04/2018 19:30 29/04/2018 19:45 29/04/2018 20:00 29/04/2018 20:15 29/04/2018 20:30 29/04/2018 20:45 29/04/2018 21:00 29/04/2018 21:15 29/04/2018 21:30 29/04/2018 21:45 29/04/2018 22:00 29/04/2018 22:15 29/04/2018 22:30 29/04/2018 22:45 29/04/2018 23:00 29/04/2018 23:15 29/04/2018 23:30 29/04/2018 23:45 30/04/2018 0:00 30/04/2018 0:15 30/04/2018 0:30 30/04/2018 0:45 30/04/2018 1:00 30/04/2018 1:15 30/04/2018 1:30 30/04/2018 1:45 30/04/2018 2:00 30/04/2018 2:15 30/04/2018 2:30 30/04/2018 2:45 30/04/2018 3:00 0.6 08 0.8 0.6 0.2 0 0 05 0.6 0.4 0.2 0 0.4 0.2 0.4 0.2 0.4 0.4 0.8 0.8 0.8 0.6 0.6 0.8 0.6 0.4 0.4 0.6 0.4 0.2 0.2 0 0 0.2 02 0 0 30/04/2018 3:15 30/04/2018 3:30 30/04/2018 3:45 30/04/2018 4:00 30/04/2018 4:15 30/04/2018 4:30 30/04/2018 4:45 30/04/2018 5:00 30/04/2018 5:15 30/04/2018 5:30 30/04/2018 5:45 30/04/2018 6:00 30/04/2018 6:15 30/04/2018 6:30 30/04/2018 6:45 30/04/2018 7:00 30/04/2018 7:15 30/04/2018 7:30 30/04/2018 7:45 30/04/2018 8:00 30/04/2018 8:15 30/04/2018 8:30 30/04/2018 8:45 30/04/2018 9:00 30/04/2018 9:15 30/04/2018 9:30 30/04/2018 9:45 30/04/2018 10:00 30/04/2018 10:15 30/04/2018 10:30 30/04/2018 10:45 30/04/2018 11:00 0.2 02 0.2 02 02 0.4 1 0.4 0.4 02 0.2 02 02 02 07 0.2 0.3 Dveloppement durable, Environnement et Lutte contre les changements climatiques Qubec SOMMAIRE CLIMATOLOGIQUE Station : Saint-Charles-de-Mandeville Latitude: 46 21' 39" 7016960 Observateur Longitude : 73 21' 51" Priode : avril 2018 Altitude : 158m Jour Temprature Prcipitation Neige Phnomnes divers * VI Max (C) Min (C) Pluie (mm) Neige (cm) Total (mm) au sol | BBGI GROT GROT POW VE (cm) 01 2,2 -1.1 0,0 0,0 0,0 55 02 4,0 -8,9 0,0 0,0 0,0 54 03 4,5 -5,5 8.7 6,0 14,7 64 1 1 04 0,1 -3,8 9,2 2,0 11,2 65 05 -3,5 -12,5 0,0 0.01 0,01 06 4,2 -19,5 0,0 4,2 4,2 67 07 4,3 -3,2 0,0 0,0 T 0,0 T 63 08 1.1 -13,0 0.0 F 0,0 T 0.0 T 63 09 2,3 -13,5 0,0 0,0 0,0 63 10 4.4 -12.8 0,0 0.0 T 0.0 T 63 1 11 7,3 -5,7 0,0 0,0 0,0 60 12 6.3 -6,0 2,8 0.0 2,8 59 13 9,9 0,1 0,0 0,0 0,0 56 14 -0,9 -6,7 0.0 0,0 0.0 56 15 -1.6 -9,3 8.2 1.0 9,2 57 1 16 0,5 -4.3 18,3 1,0 19,3 58 1 1 17 2,6 -0.4 8,3 1.7 10,0 61 1 18 7.5 -0.3 1,6 0,0 F 1,51 19 6,0 -3.0 0,0 0.0 T 0.0 T 58 F 20 7,2 0,0 0,0 0,0 0,0 56 21 11,0 -3.7 0,0 0,0 0,0 54 22 13.5 -3.5 0,0 0,0 0,0 51 23 17.0 -5.9 0,0 0,0 0,0 45 24 18,7 -2,1 0,0 0,0 0,0 40 25 11,3 2,2 20,6 0,0 20,6 30 1 26 10,0 4,8 4,4 0.0 28 1 27 13,5 -1,5 0.2 0.0 0,2 20 1 28 11,0 0.6 1.6 0.0 1.6 15 1 1 29 6,3 3,5 25,0 0,0 25,0 5 30 9,9 4,0 3,1 0,0 3,1 2 1 1 Moy: 6.4 -4,4 Tot: 112,0 15,9! 127.81 6 5 2 1 2 4 Normale: 10.2 -1.6 76,0 9,9 85,8 Comparaison la normale 1981-2010 Temprature moyenne (C) Prcipitation totale (mm) Ecart la normale -3.3 Mensuelle 149% Mensuelle Normale 1,0 4.3 127,8 Pourcentage normale 85,8 Coefficient variation Ecart type Normale Les donnes dont le jour est suivi d'un astrisque (*) ont un statut prliminaire. La journe climatologique commence 08h01 HNE et se termine 08h00 HNE le lendemain (Temp Min de 18h01 HNE la veille 18h00 HNE). Phnomnes divers :BB Brouillard-brumePO Poudrerie Orage-tonnerreW Vent violent (62 km/h et +) GI GibouleVE Verglas GR GrleVI Visibilit (
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