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โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

*
Table 7.7 Estimated VF and the adjusted WTA (WTA ) based on the SRF case

Watersheds WTA VF WTA*

Salawin 0.03 2.7 0.09

Kok 0.03 3.0 0.09
Ping 0.05 2.4 0.13

Wang 0.05 2.3 0.12
Yom 0.10 2.3 0.24

Nan 0.03 2.3 0.07
Khong 0.02 2.6 0.05

Chi 0.28 2.5 0.70

Mun 0.39 2.9 1.11
Chao Phraya 0.25 2.5 0.61

Sakae Krang 0.08 2.3 0.18
Pasak 0.10 2.6 0.26

Thachin 0.23 2.5 0.58
Mae Klong 0.03 2.7 0.09

Petchaburi 0.04 2.9 0.12
West Coast Gulf 0.20 2.3 0.46

Prachin Buri 0.03 2.9 0.08
Bang Pakong 0.06 2.6 0.15

Thole Sap 0.04 2.7 0.10

East-Coast Gulf 0.02 2.7 0.06
Peninsula-East coast 0.13 2.4 0.31

Tapi 0.12 2.3 0.29
Thale sap Songkhla 0.02 2.1 0.05

Pattani 0.07 2.1 0.14
Peninsula-West coast 0.01 2.7 0.03

7.2 Calculations of water stress index (WSI)

To calculate the water stress index for each river basin, a general formula for calculating

the water stress index (WSI) of a basin of Pfister et al. (2009) as shown in Equation (5) is then
applied. Table 7.8 and Figure 7.1 show the results obtained from the calculations based on the

average annual water withdrawals and the water availability as shown in Table 7.1 and Table 7.6,

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