Alert on 59 km between Kiriella and Watawala
Around Eheliyagoda and Dehiowita, km 23–63, km 87–110.
Also: Watch on 63 km between Ratnapura and Hatton
You reach it about Tue 09:40, 40 min after leaving, and are through it by Tue 12:10.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 100 mm, if the rains continue, be on alert on the possibility of landslides, slope failures, rock falls, cut failures and ground subsidence, being ready to evacuate to a safe location if the need arises.
- Ratnapura to Kiriella
Watchkm 0–23 - Eheliyagoda
Alertkm 23–46 - near Dehiowita
Watchkm 46–49 - Dehiowita
Alertkm 49–62 - Yatiyantota to Kithulgala
Watchkm 62–87 - Ginigathhena to Watawala
Alertkm 87–110 - Hatton
Watchkm 110–122
Alert on 58 km between Eheliyagoda and Kithulgala
Around Eheliyagoda and Dehiowita, km 28–56, km 80–112.
Also: Watch on 68 km between Ratnapura and Hatton
You reach it about Tue 10:00, 50 min after leaving, and are through it by Tue 12:35.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 100 mm, if the rains continue, be on alert on the possibility of landslides, slope failures, rock falls, cut failures and ground subsidence, being ready to evacuate to a safe location if the need arises.
- Ratnapura
Watchkm 0–29 - Eheliyagoda to Dehiowita
Alertkm 29–56 - Yatiyantota to Kithulgala
Watchkm 56–80 - near Kithulgala
Alertkm 80–111 - Dickoya to Hatton
Watchkm 111–126
Watch on 82 km between Ratnapura and Hatton
Around Ratnapura and Bogawantalawa, km 0–53, km 83–113.
It starts where you set off; you are through it by Tue 13:10.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 75mm, if the rain continues, be watchful on the possibility of landslides, slope failures, rock falls, cutting failures and ground subsidence.
- Ratnapura
Watchkm 0–53 - Pinnawala Town
Not listedkm 53–84 - Bogawantalawa to Hatton
Watchkm 84–113
Before you go
We don’t know about road closures or damage. Be cautious on the way, especially in the hills in rain.
About the Ratnapura–Hatton road
The fastest road we know from Ratnapura to Hatton is 122 km, about 3 h 40 min, via Kiriella, Ginigathhena.
Main roads on it: Gingathena Road (33 km), Ratnapura Road (20 km), Hatton Road (17 km).
We show 3 roads between them, fastest first.
DS divisions on this road
It passes through 8 DS divisions in 4 districts, in travel order:
Past NBRI bulletins
Most often listed on this road, in the 41 NBRI bulletins we have passed on since Sun 20 Sept: Yatiyanthota (36), Ratnapura (35), Dehiovita (30).
A record of past bulletins, not a forecast. Not being listed doesn’t mean safe.
Steep terrain
About 7 km of it runs through steep terrain (slopes over 30° beside the road). The longest stretch is between Ginigathhena and Watawala.
Terrain beside the road, from a satellite elevation model: not the road’s gradient and not a landslide hazard rating.
How to read this
- Not an official service. NBRI’s warnings are passed on as issued.
- Rain levels compare each division with its own satellite record since 2000. Satellites can miss heavy local downpours.
- Gauge sources: Department of Meteorology and Irrigation Department gauge readings, passed on as published. Met gauge sites are approximate. Compared with each division's own satellite record since 2000. This is not a warning and does not replace NBRI's levels. Satellites can miss heavy local downpours, so it never means a road is safe. Satellite data up to 10 Nov, 03:30. Checked Tue 10 Nov, 09:10.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Eheliyagoda | Alert | 23 |
| Dehiovita | Alert | 44 |
| Ambagamuwa | Alert | 87 |
| Ratnapura | Watch | 0 |
| Kiriella | Watch | 6 |
| Seethawaka | Watch | 46 |
| Yatiyanthota | Watch | 62 |
| Norwood | Watch | 109 |
Rain on route
×Heavy rain, up to 113.5 mm in 24 h
Rain gauges near your route
Key
- 1 Ratnapura, 8.3 mm, light rain
- 4 Kiriella, 113.5 mm, heavy rain
- 19 Kithulgala, 35.9 mm, moderate rain
- 23 Norton, 14.2 mm, moderate rain
21 gauges not reporting.
Gauge coverage: most of the route.
NBRI's warning stays in force after rain eases.
Satellite estimate
- Last 3 days: among the wettest 1% of 3-day periods since 2000 in Kiriella, Dehiovita.
Rain outlook (computer model) · Next day: Chance of a rare wet day
- Next day: a chance of a wet day of the kind that comes about 1–2 days a month in Ratnapura, Yatiyanthota, Ambagamuwa, Norwood (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 11 Nov, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Ratnapura, Kiriella, Eheliyagoda, Ambagamuwa +1 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 13 Nov, 05:30)
- "Not signalled" never means dry or safe. This is a computer model, not a warning, and it never changes NBRI's levels. Like the satellite, it reads hill-country rain low and can miss heavy local downpours.
- ECMWF ensemble forecast (open data, CC BY 4.0), run 9 Nov, 17:30, compared with each division's own satellite record.
Weather forecast (Met Dept)
×No advisory for this road
- No Department of Meteorology advisory is in force for Ratnapura, Kegalle, Colombo and Nuwara Eliya.
- Forecast issued 10 Nov, 05:30
- Showers or thundershowers will occur at times in the Northern province and in Trincomalee district.
- Showers or thundershowers will occur elsewhere in the island after 1.00 p.m.
- Covers Kegalle, Ratnapura, Nuwara Eliya and Colombo on this road: Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts.
- Showers may occur in the coastal areas of the Southern Province during the morning.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Covers Kegalle, Ratnapura, Nuwara Eliya and Colombo on this road: Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.
- Forecast for the main cities, Tuesday, 10 November 2026 (issued 9 Nov, 16:00)
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°C.
- A forecast never lowers or replaces the NBRI landslide warning above.
- Forecast and advisories by the Department of Meteorology, Sri Lanka, as issued. LankaWatch is not an official service.
Rivers and catchments
×Crosses 11 named rivers · 3 basins · Kalu Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kuru Ganga: Rare here (1–2 days a month)
Kalu Ganga · Kelani Ganga · Mahaweli Ganga
River basins along this road
- km 0–38 · Kalu Ganga basin
- km 38–98 · Kelani Ganga basin
- km 99–122 · Mahaweli Ganga basin
Satellite rain over these basins
- Kalu Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kelani Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Mahaweli Ganga basin · Last 3 days: Unusual here (3 days a month)
A whole-basin satellite average against that basin’s own record since 2000, not the area upstream of any one point. Satellites under-read hill rain. Not a warning.
Where this road crosses a river or stream
- km 1 · Katugas Ela (Kalu Ganga basin) · flows south-west
657 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 5 · Maha Ela (Kalu Ganga basin) · flows south-east
699 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 17 · Kuru Ganga (Kalu Ganga basin)
1,267 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 43 · Gatahatta oya (Kelani Ganga basin) · flows north-east
42 km² drain to this point - km 49 · Gatahatta oya (Kelani Ganga basin) · flows north
51 km² drain to this point - km 60 · Godellakumbura Ela (Kelani Ganga basin) · flows west
17 km² drain to this point - km 65–68 · Kelani Ganga · 2 crossings · flows south-west
542 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 14.7 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 68 · Madelle Oya (Kelani Ganga basin) · flows north
542 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 70 · Ekki Oya (Kelani Ganga basin) · flows west
537 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 75 · Kelani Ganga · flows west
506 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 8.9 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 81 · Bibili Oya (Kelani Ganga basin) · flows south
488 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 83 · Girankitte Oya (Kelani Ganga basin) · flows south-west
470 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 87 · Kelani Ganga · flows west
418 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 2 km downstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 99–110 · Mahaweli Ganga · 11 crossings · flows north-west
25 km² drain to this point - km 116 · Mahaweli Ganga · 2 crossings · flows north-west
11 km² drain to this point
And 3 more unnamed streams on our map
Where this road runs beside a river
- km 99–101 · beside the Mahaweli Ganga
- km 101–104 · beside the Mahaweli Ganga
- km 107–108 · beside the Mahaweli Ganga
- km 115–117 · beside the Mahaweli Ganga
Rivers and basins come from our own map of Sri Lanka’s river network. Flow direction, where shown, is worked out from the height of the land. This is orientation only, not a flood warning.
The area draining to a crossing is worked out from a terrain model (about 90 m cells) and is approximate. The rain over it is the satellite average for that same area, against its own record since 2000. Areas under about 150 km² are smaller than the satellite can see, so they show no rain.
River levels are the Irrigation Department’s own readings at its gauge, against its own thresholds. This is not a flood warning: flood warnings come from the Irrigation Department and DMC.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Eheliyagoda | Alert | 29 |
| Dehiovita | Alert | 35 |
| Ambagamuwa | Alert | 80 |
| Ratnapura | Watch | 0 |
| Kiriella | Watch | 6 |
| Kuruvita | Watch | 14 |
| Yatiyanthota | Watch | 56 |
| Norwood | Watch | 111 |
Rain on route
×Moderate rain, up to 35.9 mm in 24 h
Rain gauges near your route
Key
- 1 Ratnapura, 8.3 mm, light rain
- 13 Kithulgala, 35.9 mm, moderate rain
- 16 Laxapana, 12.4 mm, moderate rain
- 18 Norton, 14.2 mm, moderate rain
- 20 Castlereigh, 6 mm, light rain
16 gauges not reporting.
Gauge coverage: most of the route.
NBRI's warning stays in force after rain eases.
Satellite estimate
- Last 3 days: among the wettest 1% of 3-day periods since 2000 in Kiriella, Kuruvita, Dehiovita.
Rain outlook (computer model) · Next day: Chance of a rare wet day
- Next day: a chance of a wet day of the kind that comes about 1–2 days a month in Ratnapura, Yatiyanthota, Ambagamuwa, Norwood (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 11 Nov, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Ratnapura, Kiriella, Kuruvita, Eheliyagoda +2 (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 13 Nov, 05:30)
- "Not signalled" never means dry or safe. This is a computer model, not a warning, and it never changes NBRI's levels. Like the satellite, it reads hill-country rain low and can miss heavy local downpours.
- ECMWF ensemble forecast (open data, CC BY 4.0), run 9 Nov, 17:30, compared with each division's own satellite record.
Weather forecast (Met Dept)
×No advisory for this road
- No Department of Meteorology advisory is in force for Ratnapura, Kegalle and Nuwara Eliya.
- Forecast issued 10 Nov, 05:30
- Showers or thundershowers will occur at times in the Northern province and in Trincomalee district.
- Showers or thundershowers will occur elsewhere in the island after 1.00 p.m.
- Covers Kegalle, Ratnapura and Nuwara Eliya on this road: Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts.
- Showers may occur in the coastal areas of the Southern Province during the morning.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Covers Kegalle, Ratnapura and Nuwara Eliya on this road: Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.
- Forecast for the main cities, Tuesday, 10 November 2026 (issued 9 Nov, 16:00)
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°C.
- A forecast never lowers or replaces the NBRI landslide warning above.
- Forecast and advisories by the Department of Meteorology, Sri Lanka, as issued. LankaWatch is not an official service.
Rivers and catchments
×Crosses 14 named rivers · 3 basins · Kalu Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Sitawaka Gaga: Very rare here (a few days a year)
Kalu Ganga · Kelani Ganga · Mahaweli Ganga
River basins along this road
- km 0–34 · Kalu Ganga basin
- km 34–124 · Kelani Ganga basin
- km 124–126 · Mahaweli Ganga basin
Satellite rain over these basins
- Kalu Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kelani Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Mahaweli Ganga basin · Last 3 days: Unusual here (3 days a month)
A whole-basin satellite average against that basin’s own record since 2000, not the area upstream of any one point. Satellites under-read hill rain. Not a warning.
Where this road crosses a river or stream
- km 1 · Katugas Ela (Kalu Ganga basin) · flows south-west
657 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 5 · Maha Ela (Kalu Ganga basin) · flows south-east
699 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 20 · Kuru Ganga (Kalu Ganga basin)
15 km² drain to this point - km 30 · N C (Kalu Ganga basin)
0.6 km² drain to this point - km 38–42 · Ambalanpitiya Oya (Kelani Ganga basin) · 4 crossings · flows north
70 km² drain to this point - km 43 · Sitawaka Gaga (Kelani Ganga basin) · flows west
300 km² drain to this point · rain over that area, Last 3 days: Very rare here (a few days a year)
Deraniyagala (Irrigation Dept), an Irrigation Department gauge 9.9 km upstream (162 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 120.4 mm in the 24 hours to 10 Nov, 08:30 (Heavy); 0 mm in the 3 hours to 10 Nov, 09:03.
River level 0.96 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 4.8, minor flood 5.8, major flood 7 m) - km 48 · Maha Oya (Kelani Ganga basin) · flows south-west
23 km² drain to this point - km 53 · Godellakumbura Ela (Kelani Ganga basin) · flows west
17 km² drain to this point - km 58–61 · Kelani Ganga · 2 crossings · flows south-west
542 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 14.7 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 61 · Madelle Oya (Kelani Ganga basin) · flows north
542 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 63 · Ekki Oya (Kelani Ganga basin) · flows west
537 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 68 · Kelani Ganga · flows west
506 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 8.9 km upstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 75 · Bibili Oya (Kelani Ganga basin) · flows south
488 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 77 · Girankitte Oya (Kelani Ganga basin) · flows south-west
470 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month) - km 80 · Kelani Ganga · flows west
418 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Kithulgala, an Irrigation Department gauge 2 km downstream (425 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 35.9 mm in the 24 hours to 9 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 08:06.
River level 2.24 m · Below Alert · rising over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 6 m) - km 109–115 · Kehelgama Ganga (Kelani Ganga basin) · 7 crossings · flows north-west
148 km² drain to this point
And 6 more unnamed streams on our map
Where this road runs beside a river
- km 112–113 · beside the Kehelgama Ganga
- km 113–115 · beside the Kehelgama Ganga
Rivers and basins come from our own map of Sri Lanka’s river network. Flow direction, where shown, is worked out from the height of the land. This is orientation only, not a flood warning.
The area draining to a crossing is worked out from a terrain model (about 90 m cells) and is approximate. The rain over it is the satellite average for that same area, against its own record since 2000. Areas under about 150 km² are smaller than the satellite can see, so they show no rain.
River levels are the Irrigation Department’s own readings at its gauge, against its own thresholds. This is not a flood warning: flood warnings come from the Irrigation Department and DMC.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Ratnapura | Watch | 0 |
| Balangoda | Watch | 36 |
| Norwood | Watch | 84 |
Rain on route
×Light rain, up to 8.3 mm in 24 h
Rain gauges near your route
Key
- 1 Ratnapura, 8.3 mm, light rain
- 13 Norwood, ≥ 6.7 mm, light rain or more (incomplete day)
12 gauges not reporting.
Gauge coverage: most of the route.
NBRI's warning stays in force after rain eases.
Satellite estimate
- Last 3 days: among the wettest 5% of 3-day periods since 2000 in Ratnapura, Balangoda, Imbulpe, Norwood.
Rain outlook (computer model) · Next day: Chance of a rare wet day
- Next day: a chance of a wet day of the kind that comes about 1–2 days a month in Ratnapura, Balangoda, Imbulpe, Norwood (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 11 Nov, 05:30)
- Next 3 days: a chance of a wet day of the kind that comes about 1–2 days a month in Ratnapura, Balangoda, Imbulpe, Norwood (the wettest 5% of days there; several times the usual chance). (10 Nov, 05:30 to 13 Nov, 05:30)
- "Not signalled" never means dry or safe. This is a computer model, not a warning, and it never changes NBRI's levels. Like the satellite, it reads hill-country rain low and can miss heavy local downpours.
- ECMWF ensemble forecast (open data, CC BY 4.0), run 9 Nov, 17:30, compared with each division's own satellite record.
Weather forecast (Met Dept)
×No advisory for this road
- No Department of Meteorology advisory is in force for Ratnapura and Nuwara Eliya.
- Forecast issued 10 Nov, 05:30
- Showers or thundershowers will occur at times in the Northern province and in Trincomalee district.
- Showers or thundershowers will occur elsewhere in the island after 1.00 p.m.
- Covers Ratnapura and Nuwara Eliya on this road: Heavy falls above 100mm are likely at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle and Matara districts.
- Showers may occur in the coastal areas of the Southern Province during the morning.
- The general public is kindly requested to take adequate precautions to minimize damage caused by temporary localized strong winds and lightning during thundershowers.
- Covers Ratnapura and Nuwara Eliya on this road: Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Uva provinces and in Galle, Matara and Kurunegala districts during the early hours of the morning.
- Forecast for the main cities, Tuesday, 10 November 2026 (issued 9 Nov, 16:00)
- Ratnapura: Showers or thundershowers after 1.00p.m. Max 33°C, min 23°C.
- A forecast never lowers or replaces the NBRI landslide warning above.
- Forecast and advisories by the Department of Meteorology, Sri Lanka, as issued. LankaWatch is not an official service.
Rivers and catchments
×Crosses 4 named rivers · 4 basins · Kalu Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Kalu Ganga: Rare here (1–2 days a month)
Kalu Ganga · Walawe Ganga · Kelani Ganga …
River basins along this road
- km 0–37 · Kalu Ganga basin
- km 37–83 · Walawe Ganga basin
- km 83–111 · Kelani Ganga basin
- km 111–113 · Mahaweli Ganga basin
Satellite rain over these basins
- Kalu Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Walawe Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Kelani Ganga basin · Last 3 days: Rare here (1–2 days a month)
- Mahaweli Ganga basin · Last 3 days: Unusual here (3 days a month)
A whole-basin satellite average against that basin’s own record since 2000, not the area upstream of any one point. Satellites under-read hill rain. Not a warning.
Where this road crosses a river or stream
- km 4–6 · Kalu Ganga · 4 crossings
199 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Rathnapura, an Irrigation Department gauge on this river (640 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 39.5 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 09:04.
River level 4.83 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m) - km 11 · Kalu Ganga
2.1 km² drain to this point
Rathnapura, an Irrigation Department gauge on this river (640 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 39.5 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 09:04.
River level 4.83 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5.2, minor flood 7.5, major flood 9.5 m) - km 29 · Randi Oya (Kalu Ganga basin) · flows south-west
18 km² drain to this point - km 52 · Walawe Ganga · flows south-east
132 km² drain to this point - km 89 · Hambamata Oya (Kelani Ganga basin) · flows north-west
27 km² drain to this point
Norwood, an Irrigation Department gauge 13.4 km downstream (97 km² upstream): at least 6.7 mm in the 24 hours to 9 Nov, 08:30 (2 hourly readings missing); 0 mm in the 3 hours to 10 Nov, 08:02.
River level 1.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 1.5, minor flood 3, major flood 4.5 m) - km 95–103 · Hambamata Oya (Kelani Ganga basin) · 8 crossings · flows north-west
97 km² drain to this point
Norwood, an Irrigation Department gauge 0.4 km downstream (97 km² upstream): at least 6.7 mm in the 24 hours to 9 Nov, 08:30 (2 hourly readings missing); 0 mm in the 3 hours to 10 Nov, 08:02.
River level 1.2 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 1.5, minor flood 3, major flood 4.5 m)
And 8 more unnamed streams on our map
Where this road runs beside a river
- km 4–5 · beside the Kalu Ganga
- km 98–100 · beside the Hambamata Oya
- km 100–102 · beside the Hambamata Oya
Rivers and basins come from our own map of Sri Lanka’s river network. Flow direction, where shown, is worked out from the height of the land. This is orientation only, not a flood warning.
The area draining to a crossing is worked out from a terrain model (about 90 m cells) and is approximate. The rain over it is the satellite average for that same area, against its own record since 2000. Areas under about 150 km² are smaller than the satellite can see, so they show no rain.
River levels are the Irrigation Department’s own readings at its gauge, against its own thresholds. This is not a flood warning: flood warnings come from the Irrigation Department and DMC.