Alert on 33 km between Ududumbara and Watawala
Around Ududumbara and Ginigathhena, km 20–37, km 130–147.
Also: Watch on 76 km between Mahiyanganaya and Hatton
You reach it about Tue 11:10, 30 min after leaving, and are through it by Tue 14:50.
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.
- Mahiyanganaya
Not listed, Watchkm 0–20 - Ududumbara
Alertkm 20–37 - Hunnasgiriya to Madawala
Not listedkm 37–82 - Gampola to Nawalapitiya
Watchkm 82–130 - Ginigathhena to Watawala
Alertkm 130–146 - Hatton
Watchkm 146–159
Alert on 51 km between Walapane and Ragala
Around Walapane and Ragala, km 25–76.
Also: Watch on 13 km between Walapane and Hatton
You reach it about Tue 11:20, 40 min after leaving, and are through it by Tue 12:55.
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.
- Mahiyanganaya
Not listedkm 0–25 - Walapane to Ragala
Alertkm 25–76 - Nanu Oya
Not listedkm 76–123 - Pooliyawatta to Hatton
Watchkm 123–135
Watch on 46 km between Meegahakiula and Hatton
Around Meegahakiula and Bogawantalawa, km 18–20, km 23–40, km 158–188.
You reach it about Tue 11:00, 30 min after leaving, and are through it by Tue 16:35.
NBRI’s bulletin is valid until Tue 20:00, so it covers that time.
Since the rainfall within the past 24 hours has exceeded 75mm, if the rain continues, be watchful on the possibility of landslides, slope failures, rock falls, cutting failures and ground subsidence.
- Mahiyanganaya
Not listedkm 0–23 - Meegahakiula
Watchkm 23–39 - Badulla to Haldummulla
Not listedkm 39–158 - Bogawantalawa to Hatton
Watchkm 158–187
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 Mahiyanganaya–Hatton road
The fastest road we know from Mahiyanganaya to Hatton is 159 km, about 4 h 50 min, via Gampola, Nawalapitiya.
Main roads on it: Kandy-Mahiyanganaya Road (50 km), Hatton Road (17 km), Gampola-Nawalapitiya Road (15 km).
We show 3 roads between them, fastest first.
DS divisions on this road
It passes through 15 DS divisions in 3 districts, in travel order:
- Mahiyanganaya
- Minipe
- Udadumbara
- Medadumbara
- Kundasale
- Pathadumbara
- Kandy Four Gravets & Gangawata Korale
- Harispattuwa
- Yatinuwara
- Udunuwara
- Udapalatha
- Ganga Ihala Korale
- Pasbage Korale
- Ambagamuwa
- Norwood
Past NBRI bulletins
Most often listed on this road, in the 41 NBRI bulletins we have passed on since Sun 20 Sept: Yatinuwara (27), Ambagamuwa (23), Udunuwara (20).
A record of past bulletins, not a forecast. Not being listed doesn’t mean safe.
Steep terrain
About 15 km of it runs through steep terrain (slopes over 30° beside the road). The longest stretch is near Ududumbara.
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, 05:30. Checked Tue 10 Nov, 10:45.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Udadumbara | Alert | 20 |
| Ambagamuwa | Alert | 130 |
| Minipe | Watch | 3 |
| Yatinuwara | Watch | 82 |
| Udunuwara | Watch | 87 |
| Udapalatha | Watch | 102 |
| Ganga Ihala Korale | Watch | 108 |
| Pasbage Korale | Watch | 118 |
| Norwood | Watch | 146 |
Rain on route
×Fairly heavy rain, up to 77.2 mm in 24 h
Rain gauges near your route
Key
- 9 Dunhinna (NBRI), 3.6 mm, light rain
- 11 Katugastota, 1.2 mm, light rain
- 12 Kandy NTS (NBRI), 10.6 mm, moderate rain
- 13 Peradeniya, 16 mm, moderate rain
- 15 Daskara (NBRI), 1.2 mm, light rain
- 18 Nawalapitiya, 77.2 mm, fairly heavy rain
- 22 Norton, 14.2 mm, moderate rain
17 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 Medadumbara, Kundasale, Pathadumbara, Kandy Four Gravets & Gangawata Korale +8.
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 Mahiyanganaya, Minipe, Udadumbara, Medadumbara +11 (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 Mahiyanganaya, Minipe, Udadumbara, Medadumbara +11 (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 Badulla, Kandy 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 Kandy, Nuwara Eliya and Badulla 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 Kandy, Nuwara Eliya and Badulla 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)
- Kandy: Showers or thundershowers after 1.00p.m. Max 30°C, min 24°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 9 named rivers · 1 basin · rain upstream of Mahaweli Ganga: Rare here (1–2 days a month)
Mahaweli Ganga
River basins along this road
- km 0–159 · Mahaweli Ganga basin
Satellite rain over these basins
- 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 2 · Ridikotaliya Kandura (Mahaweli Ganga basin)
5.8 km² drain to this point - km 4 · Mahaweli Ganga · flows north
4,071 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Weraganthota, an Irrigation Department gauge 2.5 km upstream (4,059 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): no complete 24-hour total (11 hourly readings missing); 0 mm in the 3 hours to 10 Nov, 10:00.
River level -2.35 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 6, major flood 8 m) - km 9 · Nicatlyadda Oya (Mahaweli Ganga basin) · flows north-west
87 km² drain to this point - km 23 · Kandekumbra Oya (Mahaweli Ganga basin) · flows north-east
1.0 km² drain to this point - km 32 · Kahatagolla Ela (Mahaweli Ganga basin) · flows south-east
1.8 km² drain to this point - km 35 · Ma Oya (Mahaweli Ganga basin) · flows south
1.9 km² drain to this point - km 57–58 · Huliu Ganga (Mahaweli Ganga basin) · 2 crossings · flows east
133 km² drain to this point - km 76 · Mahaweli Ganga · 2 crossings · flows north
1,194 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Peradeniya, an Irrigation Department gauge 9.4 km upstream (1,143 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 16 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 10:07.
River level 3.4 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 7, major flood 9 m) - km 81–88 · Mahaweli Ganga · 7 crossings · flows north-west
1,068 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Peradeniya, an Irrigation Department gauge 2.9 km downstream (1,143 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 16 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 10:07.
River level 3.4 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 5, minor flood 7, major flood 9 m) - km 92–95 · Geli Oya (Mahaweli Ganga basin) · 2 crossings · flows north-east
12 km² drain to this point - km 93 · Mada Ela (Mahaweli Ganga basin) · flows north-west
20 km² drain to this point - km 118–123 · Mahaweli Ganga · 4 crossings · flows north
187 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
Nawalapitiya, an Irrigation Department gauge 1.2 km upstream (187 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): 77.2 mm in the 24 hours to 10 Nov, 08:30 (Fairly heavy); 0 mm in the 3 hours to 10 Nov, 10:01.
River level 1.66 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3.5, minor flood 5, major flood 6 m) - km 129–147 · Mahaweli Ganga · 17 crossings · flows north-west
25 km² drain to this point - km 152–153 · Mahaweli Ganga · 2 crossings · flows north-west
11 km² drain to this point
And 4 more unnamed streams on our map
Where this road runs beside a river
- km 75–77 · beside the Mahaweli Ganga
- km 118–119 · beside the Mahaweli Ganga
- km 135–136 · beside the Mahaweli Ganga
- km 136–138 · beside the Mahaweli Ganga
- km 138–141 · beside the Mahaweli Ganga
- km 144–145 · beside the Mahaweli Ganga
- km 152–154 · 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 |
|---|---|---|
| Nildandahinna | Alert | 25 |
| Walapane | Alert | 38 |
| Meegahakivula | Watch | 14 |
| Norwood | Watch | 123 |
Rain on route
×Fairly heavy rain, up to 54.2 mm in 24 h
Rain gauges near your route
Key
- 2 Rantambe, 7.8 mm, light rain
- 3 Randenigala, 12.2 mm, moderate rain
- 4 Randenigala (NBRI), 27.6 mm, moderate rain
- 5 Mahawewa (NBRI), 15 mm, moderate rain
- 6 Munwatta (NBRI), 0 mm, dry
- 7 Puswelpitiya (NBRI), 23 mm, moderate rain
- 8 Ragala Liddesdate (NBRI), 54.2 mm, fairly heavy rain
- 11 Nuwara Eliya, 9.4 mm, light rain
- 14 Holbrook (NBRI), 11.4 mm, moderate rain
- 15 Norwood, ≥ 49.8 mm, moderate rain or more (incomplete day)
6 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 Walapane, Nuwara Eliya, Thalawakelle, 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 Mahiyanganaya, Rideemaliyadda, Meegahakivula, Kandaketiya +5 (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 Mahiyanganaya, Rideemaliyadda, Meegahakivula, Kandaketiya +5 (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 Badulla 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 Nuwara Eliya and Badulla 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 Nuwara Eliya and Badulla 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)
- Nuwara Eliya: Showers or thundershowers after 1.00p.m. Max 22°C, min 13°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 8 named rivers · 2 basins · Kelani Ganga basin rain: Rare here (1–2 days a month) · rain upstream of Dambagastalawa Oya: Rare here (1–2 days a month)
Mahaweli Ganga · Kelani Ganga
River basins along this road
- km 0–123 · Mahaweli Ganga basin
- km 123–133 · Kelani Ganga basin
- km 133–135 · Mahaweli Ganga basin
Satellite rain over these basins
- 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 3 · Galaweln Kandura (Mahaweli Ganga basin) · flows north-west
22 km² drain to this point - km 3 · Dambarawa Oya (Mahaweli Ganga basin)
22 km² drain to this point - km 12 · Meemul Kandura (Mahaweli Ganga basin) · flows south-west
269 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month) - km 18 · Badulu Oya (Mahaweli Ganga basin) · flows north
404 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month)
Thaldena, an Irrigation Department gauge 19.1 km upstream (279 km² upstream · rain over that area, Last 3 days: Unusual here (3 days a month)): 10.2 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 10:03.
River level 0.84 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 5 m) - km 25 · Uma Oya (Mahaweli Ganga basin) · flows north
727 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month) - km 91–94 · Nanu Oya (Mahaweli Ganga basin) · 3 crossings · flows north-west
29 km² drain to this point - km 107–108 · Dambagastalawa Oya (Mahaweli Ganga basin) · 2 crossings · flows north
179 km² drain to this point · rain over that area, Last 3 days: Rare here (1–2 days a month)
irr-calidonia, an Irrigation Department gauge 2.4 km downstream (186 km² upstream · rain over that area, Last 3 days: Rare here (1–2 days a month)): no report.
River level: no current data - km 108–110 · Agra Oya (Mahaweli Ganga basin) · 2 crossings · flows north-west
128 km² drain to this point - km 114–116 · Agra Oya (Mahaweli Ganga basin) · 2 crossings · flows west
20 km² drain to this point
And 6 more unnamed streams on our map
Where this road runs beside a river
- km 93–94 · beside the Nanu Oya
- km 109–110 · beside the Agra 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.
Landslide (NBRI)
×| Warned DS division | Level | From km |
|---|---|---|
| Meegahakivula | Watch | 19 |
| Norwood | Watch | 158 |
Rain on route
×Moderate rain, up to 29.6 mm in 24 h
Rain gauges near your route
Key
- 2 Rantambe, 7.8 mm, light rain
- 3 Meegahakiwula (NBRI), 29.6 mm, moderate rain
- 4 Thaldena, 10.2 mm, moderate rain
- 6 Badulla, 12.1 mm, moderate rain
- 11 Mirahawaththa (NBRI), 0 mm, dry
- 15 Samanala Wawa, 0 mm, dry
- 22 Norwood, ≥ 49.8 mm, moderate rain or more (incomplete day)
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 5% of 3-day periods since 2000 in 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 Mahiyanganaya, Rideemaliyadda, Meegahakivula, Kandaketiya +8 (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 Mahiyanganaya, Rideemaliyadda, Meegahakivula, Kandaketiya +8 (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 Badulla, 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, Nuwara Eliya and Badulla 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, Nuwara Eliya and Badulla 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.
- 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 · Walawe Ganga basin rain: Rare here (1–2 days a month)
Mahaweli Ganga · Walawe Ganga · Kelani Ganga
River basins along this road
- km 0–110 · Mahaweli Ganga basin
- km 110–158 · Walawe Ganga basin
- km 158–186 · Kelani Ganga basin
- km 186–187 · Mahaweli Ganga basin
Satellite rain over these basins
- 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 3 · Dambarawa Oya (Mahaweli Ganga basin)
29 km² drain to this point - km 6 · Rathmal Kandura (Mahaweli Ganga basin) · flows west
2.2 km² drain to this point - km 40–49 · Badulu Oya (Mahaweli Ganga basin) · 7 crossings · flows north
216 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month)
Thaldena, an Irrigation Department gauge 8.7 km downstream (279 km² upstream · rain over that area, Last 3 days: Unusual here (3 days a month)): 10.2 mm in the 24 hours to 10 Nov, 08:30 (Moderate); 0 mm in the 3 hours to 10 Nov, 10:03.
River level 0.84 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 3, minor flood 4, major flood 5 m) - km 58–61 · Badulu Oya (Mahaweli Ganga basin) · 3 crossings · flows north
121 km² drain to this point - km 78–79 · Uma Oya (Mahaweli Ganga basin) · 2 crossings · flows north
370 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month) - km 81–84 · Dougolla Oya (Mahaweli Ganga basin) · 3 crossings · flows south-east
164 km² drain to this point · rain over that area, Last 3 days: Unusual here (3 days a month) - km 97 · Kandapuhulpola Kandura (Mahaweli Ganga basin) · flows south-east
16 km² drain to this point - km 101 · Ellatotakanda Oya (Mahaweli Ganga basin) · flows north
28 km² drain to this point - km 116 · Diyakana Oya (Walawe Ganga basin) · flows south-west
0.5 km² drain to this point - km 120 · Patana Oya (Walawe Ganga basin) · flows east
0.2 km² drain to this point - km 127 · Weli Oya (Walawe Ganga basin) · flows south-east
23 km² drain to this point - km 133 · Malape Oya (Walawe Ganga basin) · flows south-east
2.7 km² drain to this point - km 138 · Kiriketi Oya (Walawe Ganga basin) · flows south-east
19 km² drain to this point - km 145 · Belihul Oya (Walawe Ganga basin) · flows south-west
27 km² drain to this point - km 164 · 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 49.8 mm in the 24 hours to 10 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 10:06.
River level 1.15 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 1.5, minor flood 3, major flood 4.5 m) - km 170–178 · 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 49.8 mm in the 24 hours to 10 Nov, 08:30 (1 hourly reading missing); 0 mm in the 3 hours to 10 Nov, 10:06.
River level 1.15 m · Below Alert · falling over about 3 hours (Department’s thresholds: Alert 1.5, minor flood 3, major flood 4.5 m)
And 10 more unnamed streams on our map
Where this road runs beside a river
- km 44–45 · beside the Badulu Oya
- km 173–174 · beside the Hambamata Oya
- km 175–176 · 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.