|
|
||
 Water Proof Cable
Remote User's PC
Data Recording PC
Telephone Line
with modems
Power Strip
Trickle
12 V Battery
Charger
120 V Power Supply
UPS
Sonde
Figure 2.4.2 Schematic of monitor setup and data transfer to a remote user
2.4.3 ANALYTICAL TOOLS
Hydrology is often described using stream gage techniques and reservoir operation records as
described in Chapter 1.3. Information about the channel morphology is often obtained when channel
discharge measurements are made but are applicable only to the transects established. Information
about substrate type and morpholgy between transects is lacking. One method of providing some of
the missing information is to survey the river reach of interest in more detail and collect substrate
samples for analysis. The level of detail of characterizing the study reach is determined by the
objectives of the study and available resources. Substrate sampling is often quite difficult if the
substrate sizes vary from boulders to fine sediments. In areas with comparable substrates, samplers
such as Ponar, Ekman, or clamshell dredges are most commonly used. In areas of deposition,
sediment cores may be collected. In areas with large cobble an appropriately sized quadrant may be
used to define the perimeter of the sample area. Often several sites are randomly selected at a
particular site and the samples are either analyzed separately for statistical comparisons or composited.
Additional sources of hydrology and morphology may be available at the project office, in the
appropriate section of the managing agency, or from previous studies conducted by university
personnel.
2.4-4
|
||
|
||
