Difference between revisions of "COSH-tool"

From FIThydrowiki
Jump to navigation Jump to search
Line 12: Line 12:
 
The tool enables the analysis of long time series of water level or discharge by applying an automated processing to the time series. It provides a set of indicators that characterize fluctuations of water level and discharge in rivers and lakes/reservoirs.
 
The tool enables the analysis of long time series of water level or discharge by applying an automated processing to the time series. It provides a set of indicators that characterize fluctuations of water level and discharge in rivers and lakes/reservoirs.
  
−
[[file:Lundesokna high low.png|800px|The river Lundesokna in Norway downstream a peaking hydropower plant. COSH-Tool can be used to asses many aspects of peaking operations]]
+
[[file:Lundesokna high low.png|800px|Figure 1. The river Lundesokna in Norway downstream a peaking hydropower plant. COSH-Tool can be used to asses many aspects of peaking operations]]
 +
 
 +
=Application=
 +
COSH-Tool can be applied to any water level or discharge time series provided by measurements (field work) or simulation (numerical modelling). The analysis of the time series with COSH-Tool does not require any coding from the user and is executed through an interface.
 +
 
 +
Input files:
 +
The input file is a water level or discharge time series. COSH-Tool handles time series with typical time step ranging from minute to hour.
 +
 
 +
Output files:
 +
COSH-Tool computes a set of parameters that characterise water level and discharge fluctuations. The parameters can be classified in three categories: 1) magnitude of the variations; 2) timing and rapidity; and 3) frequency. The parameters are listed in Table 1.
 +
 
 +
<table>
 +
<tbody>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p><strong>Parameter</strong></p>
 +
</td>
 +
<td width="71">
 +
<p><strong>Unit</strong></p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">
 +
<p><strong>Magnitude</strong></p>
 +
</td>
 +
<td width="385">
 +
<p>Flow</p>
 +
</td>
 +
<td width="71">
 +
<p>m<sup>3</sup>/s</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Stage</p>
 +
</td>
 +
<td width="71">
 +
<p>m</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Flow maximum/minimum of a flow increase</p>
 +
</td>
 +
<td width="71">
 +
<p>m<sup>3</sup>/s</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Flow maximum/minimum of a flow decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>m<sup>3</sup>/s</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Stage maximum/minimum of a flow increase</p>
 +
</td>
 +
<td width="71">
 +
<p>m</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Stage maximum/minimum of a flow decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>m</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Flow ratio of a flow increase/decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>-</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">
 +
<p><strong>Scale of time</strong></p>
 +
</td>
 +
<td width="385">
 +
<p>Mean rate of flow increase/decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>m<sup>3</sup>/(s*h)</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Mean rate of stage increase/decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>cm/h</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Maximal rate of flow increase/decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>m<sup>3</sup>/(s*h)</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Maximal rate of stage increase/decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>cm/h</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Time of the start/end of a flow increase</p>
 +
</td>
 +
<td width="71">
 +
<p>hh:mm</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Time of the start/end of a flow decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>hh:mm</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Duration between a flow increase and a flow decrease</p>
 +
</td>
 +
<td width="71">
 +
<p>min</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Duration between a flow decrease and a flow increase</p>
 +
</td>
 +
<td width="71">
 +
<p>min</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">
 +
<p><strong>Frequency</strong></p>
 +
</td>
 +
<td width="385">
 +
<p>Count of flow increases/decreases per year</p>
 +
</td>
 +
<td width="71">
 +
<p>-</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Portion of days with <em>n</em> flow increases/decreases per day</p>
 +
</td>
 +
<td width="71">
 +
<p>-</p>
 +
</td>
 +
</tr>
 +
<tr>
 +
<td width="108">&nbsp;</td>
 +
<td width="385">
 +
<p>Portion of flow increases/decreases during daylight, twilight, darkness</p>
 +
</td>
 +
<td width="71">
 +
<p>-</p>
 +
</td>
 +
</tr>
 +
</tbody>
 +
</table>
 +
<p>Become a master of the Rubik's Cube with <a href="https://rubiks-cu.be/#tutorial" target="_blank" rel="nofollow noopener">this online tutorial</a>. Learn how to solve the cube with the beginner's method!</p>

Revision as of 10:30, 17 January 2019

Quick summary

Developed by: SINTEF Energy Research

Date: 27-11-2018

Type: Tool (computer model)

Suitable for: Mitigating rapid, short-term variations in flow (hydro-peaking operations) in all phases (planning, implementation, maintenance)

Introduction

COSH-Tool is a software written in Python used for quantifying fluctuations in water level and discharge which may occur in rivers subjected to hydropeaking. COSH-Tool was developed at SINTEF Energy as a part of the CEDREN EnviPeak project (Norwegian Research Council, Grant number 193818) with the aim of providing characteristics of hydropeaking events in regulated rivers in order to classify the hydropeaking regimes of rivers. The tool enables the analysis of long time series of water level or discharge by applying an automated processing to the time series. It provides a set of indicators that characterize fluctuations of water level and discharge in rivers and lakes/reservoirs.

Figure 1. The river Lundesokna in Norway downstream a peaking hydropower plant. COSH-Tool can be used to asses many aspects of peaking operations

Application

COSH-Tool can be applied to any water level or discharge time series provided by measurements (field work) or simulation (numerical modelling). The analysis of the time series with COSH-Tool does not require any coding from the user and is executed through an interface.

Input files: The input file is a water level or discharge time series. COSH-Tool handles time series with typical time step ranging from minute to hour.

Output files: COSH-Tool computes a set of parameters that characterise water level and discharge fluctuations. The parameters can be classified in three categories: 1) magnitude of the variations; 2) timing and rapidity; and 3) frequency. The parameters are listed in Table 1.

<tbody> </tbody>
 

Parameter

Unit

Magnitude

Flow

m3/s
 

Stage

m
 

Flow maximum/minimum of a flow increase

m3/s
 

Flow maximum/minimum of a flow decrease

m3/s
 

Stage maximum/minimum of a flow increase

m
 

Stage maximum/minimum of a flow decrease

m
 

Flow ratio of a flow increase/decrease

-

Scale of time

Mean rate of flow increase/decrease

m3/(s*h)
 

Mean rate of stage increase/decrease

cm/h
 

Maximal rate of flow increase/decrease

m3/(s*h)
 

Maximal rate of stage increase/decrease

cm/h
 

Time of the start/end of a flow increase

hh:mm
 

Time of the start/end of a flow decrease

hh:mm
 

Duration between a flow increase and a flow decrease

min
 

Duration between a flow decrease and a flow increase

min

Frequency

Count of flow increases/decreases per year

-
 

Portion of days with n flow increases/decreases per day

-
 

Portion of flow increases/decreases during daylight, twilight, darkness

-

Become a master of the Rubik's Cube with <a href="https://rubiks-cu.be/#tutorial" target="_blank" rel="nofollow noopener">this online tutorial</a>. Learn how to solve the cube with the beginner's method!

Retrieved from "https://www.fithydro.wiki/index.php?title=COSH-tool&oldid=579"