Research - Dipstick/sounding rod 

Page / - last modified by TerraIndex TerraIndex on 2022/05/27 11:20 

Dipstick/sounding rod 
last modified by TerraIndex TerraIndex
on 2022/05/27 11:20

Table of Contents

With this manual technique, the depth of the sediment can be measured. The dipstick has a foot. This is lowered vertically to the bottom of the water. Then the height of the water column above the foot is measured.
A dipstick is a dipstick on a fishing rod. The difference between a stick and a fishing rod lies in the approach to the water bottom from the side (rod) or from a boat (stick). If the foot is exchanged for a point, the thickness of the 'soft' (non-consolidated) sediment or silt layer can also be determined.
General information 	
 	Name	Dipstick / sounding rod		
 	Unit of measure and parameter	Height of water column in centimeters or thickness of the sludge layer		
 	Nature technique	Physical		
 	Place of application	in situ		
 	Detection Mode	Drilling / stabbing or measurement at ground level/water bottom		
 	Applicable in separate layers	new		
 	Land soil/water bottom	water bottom		
 	Step in the data collection chain	•	Measure
•	Data collection and evaluation		
 	Moment of availability results	Measurement results are available in the field		
 	Technology development phase	Applied routinely		
 	Method of purchasing	as service or as a device		
 	General description of the implementation method	The dipstick with foot is sunk down to the sludge. There is a light version that is placed with a fishing rod or a heavier version that is carefully placed from a boat or into the water. The height of the water column can then be read on the basis of a measurement on the stick. This means that the depth at which the water bed is located is known on site.
With a sounding rod the same can be done from the side up to a maximum waterway width of 6 m.
If foot is exchanged for a point, the thickness of sediment or silt layers can also be determined.		
 	Working principle	The height of the water column can be measured by means of a graduation on the stick. A fishing rod provides a good vertical measurement from the shore.		
 	Point / line measurement / volume measurement	Point measurement		
 	Technical specifications
(including accuracy)	Dipstick is made of aluminum; periodic calibration prevents measurement errors.
Accuracy: ± 1 to 2 centimeters (depending on the wave action)		
 	Typical depth range	Dipstick maximum 5 meters
Leveling rod maximum 2 meters.
Sensitivity independent of depth		
 	Time properties	A single measurement can be performed in a short time.		
 	Measuring rate	From 1 minute per measurement		
 	Presentation results	Observation is directly readable on the dipstick; several measurements form a cross section.		
 	Cost	Vary very strongly per provider and conditions in the field: from € 20 to € 150 per measurement		
User information 	
 	availabilty	large number of providers		
 	Is technology often used?	Very organized		
 	Research phase in which technology can be applied	•	Explore
•	Design
•	Check		
 	Verification measurements / calibration measurements	are often used		
 	Frequently used application in practice	Gauging in and out of smaller waterways and of sediment or sludge layer thickness		
 	Suitability	Suitable for manually sounding waterways that are not too large.		
 	Practical experiences in the Netherlands	It is used very regularly, mainly by water boards or consultancy firms throughout the Netherlands. Experience shows that the accuracy strongly depends on the circumstances and the sounder. Manual gauging usually gives a good idea of ​​the thickness of the sludge layer.		
 	“Dos“	Measuring level with a higher measurement density at the slopes		
 	“Don'ts”	Use as little pressure as possible when probing to press the foot into the sludge layer.		
References
•	Stowa
•	Stowa: INTELLIGENTE PEILSTOK
•	SIKB-protocol 2003
Dipstick

Image	Dipstick	
Contents
•	References
•	Dipstick