Advances in Civil Engineering / 2018 / Article / Tab 3

Research Article

A Parameter Classification System for Nonrevenue Water Management in Water Distribution Networks

Table 3

MOE’s evaluation index for deteriorated pipes.

Indirect evaluation (10 items, 100 points)Direct evaluation (12 items, 100 points)

Pipe type (15)
Pipe diameter (3)
Inner pipe coating type (12)
Outer pipe coating type (4)
Elapsed years (37)
Soil type (7)
Surrounding road (3)
Connection method (5)
Number of leaks (7)
Water quality (7)
Pipe diameter (27.3)
Pipe thickness (12.4)
Coating thickness (8.5)
Pipe external corrosion depth (3.2)
External corrosion circumference (2.8)
External surface coating anagement (4.4)
Thickness of sediment (14.9)
Pipe internal corrosion depth (3.4)
Internal corrosion circumference (3.2)
Internal coating management (7.6)
Thickness of scale (7.3)
Hydraulic pressure (5.0)

Source: Waterworks Network Diagnosis Manual [39].