# HYDRATOOLS

## Hydraulic Calculator for the HP48

HYDRATOOLS solves equations frequently used to determine the discharge of
orifices, weirs, gutters, channels, and pipes in gravity and pressure conditions.
**HYDRATOOLS is particularly useful for designing storm drain
systems.**
HYDRATOOLS is very easy to use.
Just select the equation to use from the menu and
a dialog box is displayed on screen where you can fill in the values. Then press the SOLVE key to compute an answer.

HYDRATOOLS can solve the following equations:

### Partial Pipe Flow

You can always solve for **any** variable, but some of the most common uses are:
- Compute the discharge of a given pipe at any depth of flow.
- Given a discharge and a slope, compute the minimum pipe size required.
- Given a required discharge and a pipe size compute the necessary slope.

### Pipe Pressure Flow

Pressure flow allows you to:
- Determine the discharge of a pipe at a given head.
- Calculate the head required to pass a known discharge.
- Calculate the pipe size required to pass a given discharge at a given head.

### Channel Flow

Channel flow includes equations for the following channel configurations:
- Triangular
- Rectangular
- Trapezoidal
- Parabolic
- Other (By Area & Wetted Perimeter)

As with all HYDRATOOLS equations you can always solve
for any variable. For example, you can calculate the bottom width of a trapezoidal channel
required to pass a given Q at a given slope.
### Gutter Flow

- By Manning's Equation
- By Izzard's Equation

### Orifice Flow

Orifice flow conditions often arise in the design of storm water management outflow structures.
HYDRATOOLS allows you to easily compute the orifice size required to
achieve a peak discharge rate in a detention basin design.
### Weir Flow

The weir flow equations are also useful for designing storm water management outlet structures.
HYDRATOOLS is available either on a card or on disk to be downloaded into
your HP48 via the serial port. It is also included with
HYDROmate, RAMSS' TR-55 method hydrology
software for the HP48.

Hardware Requirements:

Card: HP48SX or GX with 8K RAM available

Disk: HP48S, SX, G, or GX with 24K RAM available, serial cable
The current version of HYDRAtools is 2.01. If you have an earlier version
see UPDATES for information on ordering the
latest version.