[CURVES]

**Purpose:**

Defines data curves and their X,Y points.

**Format:**

One line for each X,Y point on each curve containing:

- Curve ID label
- an X value
- a Y value

**Remarks:**

- Curves can be used to represent the following relations:
- Head v. Flow for pumps
- Efficiency v. Flow for pumps
- Volume v. Depth for tanks
- Head Loss v. Flow for General Purpose Valves

- The points of a curve must be entered in order of increasing X-values (lower to higher).
- If the input file will be used with the Windows version of EPANET, then adding a comment which contains the curve type and description, separated by a colon, directly above the first entry for a curve will ensure that these items appear correctly in EPANET's Curve Editor. Curve types include
**PUMP, EFFICIENCY, VOLUME**, and**HEADLOSS**. See the examples below.

**Example:**

[CURVES]

;ID Flow Head

;PUMP: Curve for Pump 1

C1 0 200

C1 1000 100

C1 3000 0

;ID Flow Effic.

;EFFICIENCY:

E1 200 50

E1 1000 85

E1 2000 75

E1 3000 65