Water flow through Vltava water cascade - Revision history

Tomyk007: /* Problem definition */

2014-01-15T23:05:13Z

‎Problem definition

Tomyk007: /* Problem definition */

2014-01-15T23:04:54Z

‎Problem definition

Tomyk007: /* Code */

2014-01-15T23:03:14Z

‎Code

Tomyk007: /* Code */

2014-01-15T22:47:54Z

‎Code

Tomyk007: /* Code */

2014-01-15T22:46:49Z

‎Code

Tomyk007: /* Dams */

2014-01-15T22:31:57Z

‎Dams

Tomyk007: /* General description */

2014-01-15T19:50:16Z

‎General description

Tomyk007: /* General description */

2014-01-15T19:28:41Z

‎General description

Tomyk007: Created page with "=Problem definition= My task is to simulate water flow through six best known dams on Vltava water cascade. The dams are: Hnevkovice, Orlik, Kamyk, Slapy, Stechovice and Vran..."

2014-01-15T19:24:33Z

Created page with "=Problem definition= My task is to simulate water flow through six best known dams on Vltava water cascade. The dams are: Hnevkovice, Orlik, Kamyk, Slapy, Stechovice and Vran..."

New page

=Problem definition=

My task is to simulate water flow through six best known dams on Vltava water cascade. The dams are: Hnevkovice, Orlik, Kamyk, Slapy, Stechovice and Vrane. The principle of the simulation is quite easy - how fast can the individual dams release water without the river between the dams was on third flood stage.

=Method=
To deal with the problem I have chosen the method to create a simulation in tool for modelling systems dynamics called VentSim. I have used last known version of VentSim 6.2.

=Model description=

In model there are following entities:

== General description ==

There is randomly generated initial flow and rainfall at the beginning of the simulation, both simulate much increased flow on water cascade, for example, in the spring after the snow and ice melts with bad weather conditions with raifalls. The initial flow is on start of the water cascade - this flow comes from other dams, from other rivers and from rainfall from the mountains. Every dam has two inflows and one outflow. First inflow comes from previous dam, which is located on the water cascade before, second inflow is from rainfall and other rivers, which comes into the flow between two dams.

== Dams ==

Every dam has several attributes:
* minimum flow
* maximum flow
* optimal flow
* minimal capacity
* maximal capacity
* state of 3rd flood level
* first filling coefficient
* second filling coefficient
* third filling coefficient
* first increased flow coefficient
* second increased flow coefficient
* third increased flow coefficient

(. There would be agents: individual dams - they would have attributes such as inflow, outflow, retention, current capacity, the risk of rupturing etc. Between the dams would be used Links that represent the waterway between the dams (attributes: normal flow, current flow, flooding flowrate). These information I am able to find out through the internet.
There would be randomly generated a rainfall (or constant rain) at the beginning of the simulation and they would have an impact on the water cascade. One tick would correspond to one hour, during which time the water is slowly seeping into the ground itself. User would change sliders to make affect to the rate of outflow for individual dams and also there would be settings for weather. Changes in the running simulation would appear on the graph and in a simplified graphical display. I would use NetLogo, because simulation conditions such as a weather conditions and flowout rates of the individual dams can be changed in real time during the simulation, which makes the simulation more interesting and more relevant to reality.

@@ Line 1: / Line 1: @@
 =Problem definition=
 Simulation by Tomáš Lízner
 IT496 Simulation of Systems (WS 2013/2014)
 -- Xlizt00 23:57, 15 January 2014 (CET)

@@ Line 102: / Line 102: @@
 =Code=
 '''Casual loop diagram'''
-[[Media:Example.ogg]]
+[[Media:Water_cascade.zip]]
 '''Stock and flow diagram'''

@@ Line 105: / Line 105: @@
 '''Stock and flow diagram'''
-[[Media:Water_cascade-flow6.mdl]]
+[[Media:Water cascade-flow6.zip]]
 =Resources=

@@ Line 101: / Line 101: @@
 =Code=
+'''Stock and flow diagram'''
 =Resources=

← Older revision		Revision as of 19:50, 15 January 2014
Line 15:		Line 15:

	Every dams has to respond to the increased flow into the dam and increase adequately outflow of the dam.		Every dams has to respond to the increased flow into the dam and increase adequately outflow of the dam.
		+
		+	To better work with the numbers of flow, all flows are in units of thousands. The entire simulation runs in steps of one hour and simulates period for two weeks. This situation roughly corresponds to reality. Therefore, the flow units (which are commonly stated in m3 per second) are multiplied by number 3,600. Thus we get the flow rate per hour.

	== Dams ==		== Dams ==

@@ Line 20: / Line 20: @@
 == Dams ==
-Every dam has several attributes:
+Every dam has several attributes (flow rates, flood levels, and capacities are based on real data [1] [2] [3] [4] [5] ) :
-* minimum flow
+* '''minimum flow''' - This flow is used when the dams camapicty state is under required minimum of capacity or all inflows are less or equal this number
-* maximum flow
+* '''maximum flow''' - This flow is used when the dams camapicty state is over required filling capacity and ther is threat that the dam could be ruptured
-* optimal flow
+* '''optimal flow''' - This flow is used when the dam has normal state of capacity and there is no need to use maximal outflow
-* minimal capacity
+* '''minimal capacity''' - This number specify required minimum capacity of the dam
-* maximal capacity
+* '''maximal capacity''' - This number specify maximum capacity of the dam
-* state of 3rd flood level
+* '''state of 3rd flood level''' - This number specify flood level of specific water flow between the two dams
-* first filling coefficient
+* '''first filling coefficient''' - This coefficient is used for determining percentage rate of capacity when is needed to start outflowing a little more than the optimum flow
-* second filling coefficient
+* '''second filling coefficient''' - This coefficient is used for determining a second level percentage rate of capacity when is needed to start outflowing even more than the first filling level
-* third filling coefficient
+* '''third filling coefficient''' - This coefficient is used for determining a third level percentage rate of capacity when is needed to start outflowing when the risk of rapid implementation of the dam to its maximum capacity is higher then last two levels
-* first increased flow coefficient
+* '''first increased flow coefficient''' - This coefficient is used for determinig percentage rate from maximum flow rate for using with first filling coefficient level
-* second increased flow coefficient
+* '''second increased flow coefficient''' - This coefficient is used for determinig percentage rate from maximum flow rate for using with second filling coefficient level
-* third increased flow coefficient
+* '''third increased flow coefficient''' - This coefficient is used for determinig percentage rate from maximum flow rate for using with third filling coefficient level
-  (. There would be agents: individual dams - they would have attributes such as inflow, outflow, retention, current capacity, the risk of rupturing etc. Between the dams would be used Links that represent the waterway between the dams (attributes: normal flow, current flow, flooding flowrate). These information I am able to find out through the internet.
+'''1. Start of cascade''' - There has been used function ''RANDOM NORMAL( {min} , {max} , {mean} , {stdev} , {seed} )'' min and max valuas are based on real data  [4] , stdev has been determined to value 25 - because in fact there are not big differences in inflow from hour to hour.
-There would be randomly generated a rainfall (or constant rain) at the beginning of the simulation and they would have an impact on the water cascade. One tick would correspond to one hour, during which time the water is slowly seeping into the ground itself. User would change sliders to make affect to the rate of outflow for individual dams and also there would be settings for weather. Changes in the running simulation would appear on the graph and in a simplified graphical display. I would use NetLogo, because simulation conditions such as a weather conditions and flowout rates of the individual dams can be changed in real time during the simulation, which makes the simulation more interesting and more relevant to reality.

← Older revision		Revision as of 19:28, 15 January 2014
Line 14:		Line 14:
	There is randomly generated initial flow and rainfall at the beginning of the simulation, both simulate much increased flow on water cascade, for example, in the spring after the snow and ice melts with bad weather conditions with raifalls. The initial flow is on start of the water cascade - this flow comes from other dams, from other rivers and from rainfall from the mountains. Every dam has two inflows and one outflow. First inflow comes from previous dam, which is located on the water cascade before, second inflow is from rainfall and other rivers, which comes into the flow between two dams.		There is randomly generated initial flow and rainfall at the beginning of the simulation, both simulate much increased flow on water cascade, for example, in the spring after the snow and ice melts with bad weather conditions with raifalls. The initial flow is on start of the water cascade - this flow comes from other dams, from other rivers and from rainfall from the mountains. Every dam has two inflows and one outflow. First inflow comes from previous dam, which is located on the water cascade before, second inflow is from rainfall and other rivers, which comes into the flow between two dams.

		+	Every dams has to respond to the increased flow into the dam and increase adequately outflow of the dam.

	== Dams ==		== Dams ==