Month | Average discharge (lt/s) | Peak discharge (lt/s) | Peak discharge/average discharge ratio | Vol. stored water (mm/year) |
---|---|---|---|---|
Wet season | 29.768 |
40.171 |
1.97 |
576 |
Dry season 1 | −48.778 |
−140.492 |
−0.78 |
−84 |
Dry season 2 | −13.864 |
−14.194 |
−1.83 |
325 |
Wet season | −54.590 |
−89.750 |
−2.59 |
166 |
Dry season | −59.549 |
−83.395 |
0.86 |
583 |
Annual | −47.175 |
−8.969 |
0.23 |
4,200 |
Variable | Coefficients | |
---|---|---|
Constants | 1,283,795 | 1.520 (0.13) |
Farm size | −1,702,240 | −3.012 (0.00) |
Age | −301,349 | −0.027 (0.98) |
Education | −46,701 | −1.607 (0.11) |
Income | 0.146 | 7.549 (0.00) |
Distance to small dam | −750,874 | −2.410 (0.02) |
Management in dry season | 2,144,361 | 9.369 (0.00) |
100 | ||
0.83 | ||
F-test | 84.18 | |
0.000 |
Variables | Code | Description |
---|---|---|
Farm size | X1 | Size of farmer's land (ha) |
Age | X2 | Farmer's age (years) |
Education | X3 | Farmer's formal education (years) |
Income | X4 | Farmer's income in one cropping season (US$/ha) |
Distance to small dam | X5 | Distance of farmer's land to small dam (m) |
Management in dry season | D | Dummy variable representing type of irrigation used in the dry season: (1) private water pump and (0) irrigation from WUA. |
No. | Land use | 2011 | 2019 | Land use | |||
---|---|---|---|---|---|---|---|
(ha) | (%) | (ha) | (%) | Change | (%) | ||
1. | Forest | 13,227.23 | 47.71 | 11,676.97 | 42.12 | −1550.26 | −11.72 |
2. | Plantation | 10,679.91 | 38.52 | 10,486.21 | 37.83 | −193.70 | −1.81 |
3. | Dryland | 2,480.25 | 8.95 | 4,001.91 | 14.44 | 1,521.67 | 61.35 |
4. | Rice field | 748.43 | 2.70 | 698.20 | 2.52 | −50.24 | −6.71 |
5. | Open field | 266.76 | 0.96 | 437.16 | 1.58 | 170.41 | 63.88 |
6. | Residential | 320.20 | 1.15 | 422.32 | 1.52 | 102.12 | 31.89 |
Total | 27,722.77 | 27,722.77 |
Month | Rainfall (mm/year) | Number of rainy days (day) | Rain intensity | ||||||
---|---|---|---|---|---|---|---|---|---|
1993–2010 | 2011–2019 | D | 1993–2010 | 2011–2019 | D | 1993–2010 | 2011–2019 | D | |
Wet season | −140 |
1.269 |
1.409 | −4 | 73 |
77 | −2.50 |
−0.39 |
2.10 |
Dry season 1 | 27 |
−1.055 |
−1.082 | 2 | 2 |
0 | −0.39 |
−34.17 |
−33.78 |
Dry season 2 | −10 |
224 |
234 | −1 | 56 |
56 | −2.02 |
3.39 |
5.41 |
Wet season | −64 |
120 |
184 | −1 | 91 |
92 | −0.75 |
−18.17 |
−17.42 |
Dry season | 11 |
74 |
64 | 0 | 51 |
51 | −0.16 |
−29.96 |
−29.80 |
Annual | −54 |
323 |
377 | −2 | −152 |
154 | −1.38 |
−26.41 |
−25.04 |