HydroCalc for

From Arkansoft:

Palm version of the easy to use calculator for designers of lawn sprinkler systems. Also available: HydroCalc Bundle with both Palm and Windows versions together in a "bundle" for a special price. HydroCalc calculates: Maximum system flow. Water velocity through various pipe sizes. Dynamic pressure based on static pressure, meter size, pipe sizes and materials and length, number and type of fittings, valves and backflow preventer. Determines zone or system precipitation rate based on 1 to 3 different methods. Determines evaporation and transpiration rate based on average temperature and humidity. Considers soil type, percent of slope, and whether ground is bare or planted. From all these factors, it calculates a suggested watering schedule (number of waterings per week and number of mintues per watering). Enter information from your local water bill, plus system flow rate and run time, and the program will calculate cost to run the system per week, month and year. You can print the data you generate if you have an IR-capable printer or serial cable and PalmPrint or SCSPrint software (trial version included). Context-sensitive online help. Two versions of the same program are available: a handheld computer version for Palm-type devices, and a Windows version that simulates the handheld version on your desktop computer. As you design sprinkler systems, HydroCalc lets you eliminate many hours of work consulting books and tables then doing the calculations yourself. Fully functional trial Palm version, available free of charge, allows you to try it 10 days and includes a few "please register me" nags. Comes with an interactive on-screen tutorial that demonstrates and instructs about every aspect of the program.