# Alfbach (Prüm)

The Alfbach is a 22.3-kilometre-long (13.9 mi), orographically right-bank tributary of the Prüm in the district of Bitburg-Prüm in the German state of Rhineland-Palatinate.

## Geography
### Course

The Alfbach rises in the Schneifel at a height of 631 m above sea level (NHN). Its source lies on the northern slopes of the Schwarzer Mann (697.8 m above NHN) about three kilometres northeast of Halenfeld in the municipality of Buchet.
The stream flows initially in a southwesterly direction to Halenfeld, where it collects its main tributary, the Donsbach, then turns south as far as Buchet, before changing direction to the southwest to continue through Bleialf. Near Großlangenfeld it changes its direction again to the south and, at the Hauscheid Mill (‘’Hauscheider Mühle’’) passes under the A 60 motorway. Continuing mainly in a southeasterly direction the Alfbach empties into the Prüm west of Pronsfeld at a height of 365 m above NHN.

### Catchment

The Alfbach drains a catchment area of 55.693 km$^2$ (21.503 sq mi) ; its waters flowing via the Prüm, Sauer, Moselle and Rhine to the North Sea.

### Tributaries

| Name | Left/right tributary | Length [km] | Catchment [km$^2$] | Mouth elevation [m above NHN] | Mouth location Coordinates | GKZ |
| Alfquelle | right | 1.123 | 0.652 | 561 | 50°15′59″N 6°20′36″E﻿ / ﻿50.266337°N 6.343368°E﻿ / 50.266337; 6.343368﻿ (Einmündung Alfquelle) | 26284-12 |
| Große Quelle | left0 | 0.895 | 0.242 | 536 | 50°15′47″N 6°20′12″E﻿ / ﻿50.263025°N 6.336534°E﻿ / 50.263025; 6.336534﻿ (Einmündung Große Quelle) | 26284-132 |
| Alfbachgraben | left0 | 1.120 | 0.353 | 532 | 50°15′45″N 6°20′05″E﻿ / ﻿50.262537°N 6.334665°E﻿ / 50.262537; 6.334665﻿ (Einmündung Alfbachgraben) | 26284-14 |
| Lange Alfquelle | left0 | 1.662 | 0.644 | 514 | 50°15′37″N 6°19′38″E﻿ / ﻿50.260178°N 6.327351°E﻿ / 50.260178; 6.327351﻿ (Einmündung Lange Alfquelle) | 26284-16 |
| Mombach | right | 1.422 | 1.448 | 508 | northeast of Halenfeld 50°15′35″N 6°19′30″E﻿ / ﻿50.259697°N 6.324997°E﻿ / 50.259697; 6.324997﻿ (Einmündung Mombach) | 26284-18 |
| Donsbach | right | 4.177 | 6.068 | 489 | in Halenfeld 50°15′19″N 6°18′56″E﻿ / ﻿50.255369°N 6.315417°E﻿ / 50.255369; 6.315417﻿ (Einmündung Donsbach) | 26284-2 |
| Steinbach | left0 | 1.280 | 2.202 | 476 | near Niederlascheid 50°14′51″N 6°18′52″E﻿ / ﻿50.247584°N 6.314461°E﻿ / 50.247584; 6.314461﻿ (Einmündung Steinbach) | 26284-32 |
| Dürenbach | right | 2.967 | 3.915 | 452 | in Bleialf 50°14′21″N 6°17′49″E﻿ / ﻿50.239261°N 6.297054°E﻿ / 50.239261; 6.297054﻿ (Einmündung Dürenbach) | 26284-4 |
| Sonnenbach | right | 0.674 | 0.742 | 441 | south of Bleialf 50°13′59″N 6°17′07″E﻿ / ﻿50.23309°N 6.285194°E﻿ / 50.23309; 6.285194﻿ (Einmündung Sonnenbach) | 26284-52 |
| Üchenbach | left0 | 3.607 | 4.215 | 439 | south of Bleialf 50°13′55″N 6°17′02″E﻿ / ﻿50.231819°N 6.283999°E﻿ / 50.231819; 6.283999﻿ (Einmündung Üchenbach) | 26284-6 |
| Waleschbach | right | 0.663 | 0.625 | 434 | southwest of Bleialf 50°13′43″N 6°16′39″E﻿ / ﻿50.228475°N 6.277582°E﻿ / 50.228475; 6.277582﻿ (Einmündung Waleschbach) | 26284-712 |
| Lautersbach, auch Laubertsbach | right | 0.387 | 0.323 | 432 | 50°13′31″N 6°16′30″E﻿ / ﻿50.225165°N 6.274924°E﻿ / 50.225165; 6.274924﻿ (Einmündung Lautersbach) | 26284-714 |
| Katzenbach | right | 1.195 | 1.468 | 425 | near Großlangenfeld 50°13′14″N 6°16′19″E﻿ / ﻿50.220601°N 6.271856°E﻿ / 50.220601; 6.271856﻿ (Einmündung Katzenbach) | 26284-716 |
| Eisbach | left0 | 1.975 | 1.484 | 421 | west of Brandscheid 50°12′58″N 6°16′42″E﻿ / ﻿50.216133°N 6.278431°E﻿ / 50.216133; 6.278431﻿ (Einmündung Eisbach) | 26284-72 |
| Eisbach | right | 1.362 | 0.971 | 418 | west of Brandscheid 50°12′50″N 6°16′47″E﻿ / ﻿50.213906°N 6.27966°E﻿ / 50.213906; 6.27966﻿ (Einmündung Eisbach) | 26284-7312 |
| Tunenbach | right | 1.869 | 1.236 | 407 | northeast of Habscheid 50°12′03″N 6°17′00″E﻿ / ﻿50.200746°N 6.283311°E﻿ / 50.200746; 6.283311﻿ (Einmündung Tunenbach) | 26284-7314 |
| Hollbach | right | 2.776 | 2.907 | 404 | northeast of Habscheid 50°11′48″N 6°17′05″E﻿ / ﻿50.196665°N 6.284754°E﻿ / 50.196665; 6.284754﻿ (Einmündung Hollbach) | 26284-74 |
| Paulsgraben | right | 0.618 | 0.442 | 403 | east of Habscheid 50°11′32″N 6°17′20″E﻿ / ﻿50.192092°N 6.289006°E﻿ / 50.192092; 6.289006﻿ (Einmündung Paulsgraben) | 26284-7992 |
| Waldgraben | right | 0.591 | 0.290 | 394 | east of Habscheid 50°11′18″N 6°17′59″E﻿ / ﻿50.188423°N 6.299852°E﻿ / 50.188423; 6.299852﻿ (Einmündung Waldgraben) | 26284-7994 |
| Vierenbach | left0 | 2.601 | 3.469 | 390 | east of Habscheid 50°11′07″N 6°18′30″E﻿ / ﻿50.18531°N 6.308406°E﻿ / 50.18531; 6.308406﻿ (Einmündung Vierenbach) | 26284-8 |
| Schinnbach | left0 | 2.393 | 1.631 | 387 | east of Habscheid 50°10′58″N 6°18′39″E﻿ / ﻿50.182709°N 6.31095°E﻿ / 50.182709; 6.31095﻿ (Einmündung Schinnbach) | 26284-92 |
| Schwarzbach | left0 | 1.538 | 1.008 | 387 | southeast of Habscheid 50°10′54″N 6°18′50″E﻿ / ﻿50.18165°N 6.313829°E﻿ / 50.18165; 6.313829﻿ (Einmündung Schwarzbach) | 26284-94 |
| Bosborn | right | 0.985 | 0.690 | 381 | southeast of Habscheid 50°10′32″N 6°18′58″E﻿ / ﻿50.175588°N 6.316106°E﻿ / 50.175588; 6.316106﻿ (Einmündung Bosborn) | 26284-96 |