Module Runoff - Revision history

Francisco: /* Manning Equation */

2017-05-18T16:02:25Z

‎Manning Equation

2017-05-18T16:01:46Z

‎Slope

2017-05-18T16:01:12Z

2014-02-06T17:21:49Z

‎Boundary Conditions

2014-01-17T12:05:22Z

2014-01-03T10:46:16Z

2014-01-03T10:44:42Z

2014-01-03T10:44:14Z

2013-09-13T17:57:32Z

2013-09-13T16:07:00Z

‎Boundary Conditions

@@ Line 18: / Line 18: @@
 <ref>Gauckler, P. (1867), Etudes Théoriques et Pratiques sur l'Ecoulement et le Mouvement des Eaux, Comptes Rendues de l'Académie des Sciences, Paris, France, Tome 64, pp. 818–822</ref> :
-:<math>Q_i=\frac{1}{n}\cdot A\cdot R_{h}^{2/3}\cdot s_i^{1/2}\,\,\,\,\,\,\,\,1.1)</math>
+:<math>Q_i=\frac{1}{n}\cdot A\cdot R_{h}^{2/3}\cdot s_i^{1/2}\,\,\,\,\,\,\,\,\,\,\,\,(1.1)</math>
 where:

@@ Line 75: / Line 75: @@
-:<math>s_{x}=\frac{H(i,j-1)-H(i,j)}{DZX}\hspace {5.1cm}(1.5)</math>
+:<math>s_{x}=\frac{H(i,j-1)-H(i,j)}{DZX}\,\,\,\,\,\,\,\,(1.5)</math>
@@ Line 91: / Line 91: @@
-:<math>s_{y}=\frac{H(i-1,j)-H(i,j)}{DZY}\hspace {5.1cm}(1.6)</math>
+:<math>s_{y}=\frac{H(i-1,j)-H(i,j)}{DZY}\,\,\,\,\,\,\,\,(1.6)</math>
@@ Line 110: / Line 110: @@
-:<math>s= 0.05247 + 0.06363 \cdot s - 0.182\cdot e^{(-62.38\cdot s)}\hspace {2.4cm}(1.7)</math>
+:<math>s= 0.05247 + 0.06363 \cdot s - 0.182\cdot e^{(-62.38\cdot s)}\,\,\,\,\,\,\,\,\,\,\,\,(1.7)</math>

@@ Line 18: / Line 18: @@
 <ref>Gauckler, P. (1867), Etudes Théoriques et Pratiques sur l'Ecoulement et le Mouvement des Eaux, Comptes Rendues de l'Académie des Sciences, Paris, France, Tome 64, pp. 818–822</ref> :
-:<math>Q_i=\frac{1}{n}\cdot A\cdot R_{h}^{2/3}\cdot s_i^{1/2}\hspace {5.7cm}(1.1)</math>
+:<math>Q_i=\frac{1}{n}\cdot A\cdot R_{h}^{2/3}\cdot s_i^{1/2}\,\,\,\,\,\,\,\,1.1)</math>
 where:
@@ Line 39: / Line 39: @@
-:<math>R_{h}=\frac{w\cdot h}{w+2\cdot h}\hspace {6.8cm}(1.2)</math>
+:<math>R_{h}=\frac{w\cdot h}{w+2\cdot h}\,\,\,\,\,\,\,\,(1.2)</math>
-But in runoff the lateral cell face is open boundary (to the next cell) not exerting fricition in a surface as the bottom boundary, and so hydraulic radius can be rewritten:
+But in runoff the lateral cell face is open boundary (to the next cell) not exerting friction in a surface as the bottom boundary, and so hydraulic radius can be rewritten:
-:<math>R_{h}=\frac{w\cdot h}{w}\hspace {6.8cm}(1.2)</math>
+:<math>R_{h}=\frac{w\cdot h}{w}\,\,\,\,\,\,\,\,(1.2)</math>
@@ Line 50: / Line 50: @@
-:<math>Q=\frac{1}{n}\cdot w\cdot h^{5/3}\cdot s^{1/2}\hspace {5.8cm}(1.3)</math>
+:<math>Q=\frac{1}{n}\cdot w\cdot h^{5/3}\cdot s^{1/2}\,\,\,\,\,\,\,\,(1.3)</math>
 ====Slope====
@@ Line 57: / Line 57: @@
-:<math>H(i,j)= h(i,j)+T(i,j)\hspace {5.5cm}(1.4)</math>
+:<math>H(i,j)= h(i,j)+T(i,j)\,\,\,\,\,\,\,\,\,\,\,\,(1.4)</math>

@@ Line 146: / Line 146: @@
 ==Boundary Conditions==
-In Runoff there is the option to define the boundary condition as a level. This level will be imposed at the boundary and the water will exit if the water level is higher than the boudary level.
+In Runoff there is the option to define the boundary condition as a level or as a timeserie (tide). This level will be imposed at the boundary and if the user wishes a) the water will only exit if the water level is higher than the boundary level and no inflow is allowed or b) inflow is allowed if the boundary level is higher than water level.
 ===Computation===
-The boundary fluxes are computed after the flow computation iteration. The flux may occur if the runoff level in boundary cells is higher than imposed level.
+Boundary fluxes are computed after the flow computation iteration.
-where cel is celerity
+The boundary flux is computed with celerity in both directions (x and y) where boundary face exists.
-where A is vertical Area for flux
+ Qi = - cel  *  Li * min(dh,h)
 ===Keywords===
@@ Line 167: / Line 173: @@
 Using a value of the latter keyword higher than the maximum altimetry found in the watershed will make the boundary open in all watershed.
 ==Discharges==

← Older revision		Revision as of 12:05, 17 January 2014
Line 167:		Line 167:

	Using a value of the latter keyword higher than the maximum altimetry found in the watershed will make the boundary open in all watershed.		Using a value of the latter keyword higher than the maximum altimetry found in the watershed will make the boundary open in all watershed.
		+
		+	==Discharges==
		+
		+	In Runoff the discharges may be positive or negative (Runoff uses discharge flow) and are dealt with ModuleDischarges.
		+
		+	===Computation===
		+	The discharges are initialized in Construct phase reading its locations and checking if inside boundaries.
		+
		+	In Modification phase, the several discharges flows are accounted and water volume updated. The computation is inside the water column iteration process.
		+	And integration variable integrates this flow for RunoffProperties.
		+
		+	===Keywords===
		+	For discharges to be read in Discharges_X.dat the following keyword needs to exist in the Runoff_X.dat
		+	DISCHARGES : 1
		+	Without these keyword no matter what is inside Discharges_X.dat it will not be read!
		+

	==Other Features==		==Other Features==

@@ Line 9: / Line 9: @@
 ===St. Venant Equations ===
-The St. Venant Equations are derived from the Newton's second law taking into account inertia effects. In this case a 2D approach is followed. [[Equations_in_Mohid_Land | See equations description]].
+The St. Venant Equations are derived from the Newton's second law taking into account inertia effects. In this case a 2D approach is followed. [[Equations_in_Mohid_Land#2D_descritization_.28Runoff.29 | See equations description]].
 ===Manning Equation===

@@ Line 148: / Line 148: @@
 ===Boundary Conditions===
 In Runoff there is the option to define the boundary condition as a level. This level will be imposed at the boundary and the water will exit if the water level is higher than the boudary level.
 ====Computation====