HF002

Attributes in entity 3: Rating equations for gaged watersheds		Details
1. DBCODE Definition: FSDB database code Domain: enum
2. ENTITY Definition: Entity number Units: number Domain: range (minimum = 3.  maximum = 3.)
3. STUDY_AREA Definition: Study area code Domain: enum
4. SITECODE Definition: Site code Domain: place
5. EQ_SET Definition: Rating equation set for the current flume status, generally assigned alphabetically over time as rating curve changes Domain: enum
6. EQ_VER Definition: Rating equation set version - the highest version number is current for each equation set Units: number Domain: range (minimum = 1.  maximum = 4.)
7. EQN_SET_CODE Definition: Equation set code represents a distinct code, that is cross-referenced in HF00401 discharge output, for every equation set from each study area and site including all relevant versions over time Domain: enum
8. EQ_NUM Definition: Specific rating equation number - when more than one equation in a set, piecemeal equations are sequenced with lowest stage height values included in number 1 Units: number Domain: range (minimum = 1.  maximum = 9.)
9. WS_ACRES Definition: Area of the watershed above the gaging station Units: acres Domain: range (minimum = 21.1  maximum = 15424.0)
10. MAX_HT Definition: Maximum stage height permitted for a given equation number Units: feet Domain: range (minimum = 0.0040  maximum = 9.0000)
11. LN_A Definition: The constant, ln(a), which is the intercept parameter in the rating equation: ln(y)=ln(a)+b*ln(x) Units: number Domain: range (minimum = -15.1000  maximum = 4.5200)
12. B Definition: The constant, b, which is the slope parameter in the rating equation: ln(y)=ln(a)+b*ln(x) Units: number Domain: range (minimum = 0.2400  maximum = 17.5000)
13. C Definition: The constant, c, which is the quadratic parameter in the rating equation: ln(y)=ln(a)+b*ln(x)+c*ln(x)**2+d*ln(x)**3 Units: number Domain: range (minimum = 0.0000  maximum = 0.3500)
14. D Definition: The constant, d, which is the cubic parameter in the rating equation: ln(y)=ln(a)+b*ln(x)+c*ln(x)**2+d*ln(x)**3 Units: number Domain: range (minimum = 0.0000  maximum = 0.0600)