Service

Weighting criteria

Likert scores/Multipliers (w = 1, 2, 3)

Groundwater recharge (G)

Does an underlying aquifer exist to store the water that percolates?

$G_{nw}=\left[\begin{array}{cc}{G}_n\times 3,& \text{for}\text{major}\text{aquifer}\\ G_n\times 2,& \text{for}\text{minor}\text{aquifer}\\ G_n\times 1,& \text{for}\text{no}\text{aquifer}\end{array}\right]$ ^1,2

(1)

Surface water supply (R)

How many reservoirs (r) are located below the watershed?

$R_{nw}=\left[\begin{array}{cc}{R}_n\times 3,& r>5\\ R_n\times 2,& 5\ge r>1\\ R_n\times 1,& r\le 1\end{array}\right]$

(2)

Soil retention (S)

The productivity of the soils within the watershed

$S_{nw}=\left[\begin{array}{cc}{S}_n\times 3,& \text{for}\text{highly}\text{productive}\text{soils}\\ S_n\times 2,& \text{for}\text{moderately}\text{productive}\text{soils}\\ S_n\times 1,& \text{for}\text{low}\text{productive}\text{soils}\end{array}\right]$

(3)

Carbon storage (C)

How much carbon (t/ha CO₂) is emitted (e) from the watershed?

$C_{nw}=\left[\begin{array}{cc}{C}_n\times 3,& e\ge 100000\\ C_n\times 2,& 100000>e>0\\ C_n\times 1,& e=0\end{array}\right]$

(4)