DG-300 Design Guidelines for Piped Water Networks in Refugee Settings (UNHCR, 2015)

Publisher: UNHCR
Year: 2015
Description:
This document contains guidelines to help UNHCR and WASH actors design piped water networks in refugee settings. It describes the minimum documentation that should be included for a water network design project including:
a. Project description, background, context and purpose
b. Scope of work
c. Map of the existing and proposed water network layout
d. Topographic survey
e. Daily water demand calculation
f. Daily water availability calculation
g. Main supply pipeline sizing calculation
h. Pump selection calculation and justification (if required)
i. Water treatment calculation and justification (if required)
j. Water distribution network general layout
k. Water distribution network peak flow calculation
l. Water distribution network optimal pipe sizing calculation
m. Water storage capacity calculation
n. Locations of washouts, air valves and network isolation valves
o. Tapstands and household connections
p. Water system sub-component design documentation
q. Complete system bills of quantity
r. Plumbing schematic
s. Construction materials and workmanship specifications
t. Considerations for operation and maintenance (operator’s manual)