Water code number (Germany)
The water body code ( GKZ , GWK or GEWKZ ), also area code , is an identifier that is used to number all bodies of water in Germany (not just running water ) as well as their catchment areas and precipitation areas. The river code number includes an additional 10 digits that can be used to divide watercourses into small sections.
definition
In order to obtain parameters that are comparable nationwide and that can be used for data processing, the Federal / State Working Group on Water (LAWA) decided in 1970 to name the waters and their surface catchment areas that are important for hydrological work according to a uniform system and to provide them with key figures. Associated with this was the definition of the catchment areas.
Every flowing body of water ( streams , rivers , canals , ditches ) and its catchment area is assigned a water body number that can be used to clearly identify it. The water body code is structured hierarchically so that the first digits of the code number indicate which river system a body of water belongs to, and each additional figure describes the position of a body of water in the river system and the position of a stretch of water in a river course.
Apart from the initial digits of the large river systems, even and odd digits of a German river code have different functions: The confluences are numbered with even digits, the river sections with odd digits. Each river course is divided into up to five sections by its up to four major tributaries, each of these sections in turn by up to four inflows into up to five sections. Their tributaries and subsections are numbered according to the same principle.
Thus, a waterway code with an even final digit always identifies a watercourse, a waterway code with an odd final digit always a section of a watercourse.
On the other hand, the water code number has 13 (theoretically 19 according to the ATKIS portal) points to represent all branches and source streams of flowing waters, of which only 10 are used in practice. For filling up to full numbers, the lower sections of the river use zero, and those that follow upstream use one. This can be followed by ten more digits to (quote :) specification of the additional area or section identifier for the water body code, which results in a 29-digit water body code .
River areas
The first digit of the code denotes the river area
The second and the following digits of the key figures indicate watercourse sections and tributaries and the corresponding subdivision of the catchment area.
system
Determination of the rivers
The principle of German numbering makes it necessary both for the river ("Strom"), which flows into the sea somewhere, and for each tributary to define the upper reaches up to a source. There are no confluences at which both tributaries end and a new river begins; only the lower-ranking river ends, the higher-ranking one continues.
Basically, a river course can be defined in three different ways, sometimes also subdivided according to criteria:
- Hydrological: The ranking of two confluent bodies of water can be determined according to the length of the water body from the most distant source, according to the discharge quantities and according to the area of the catchment areas .
- Namely: The geographical name (word name ) can go through historical developments, and a river course can have different names in sections. They can also be ambiguous: in some places source streams are not differentiated by name. In some areas every village has its "Mühlbach".
- Hydrographic: This is the definition given by the state environmental authorities. To a certain extent, it is also the processing numbers that are used by the associations created for water management (water and soil associations, drainage associations, etc.).
The hydrographic determination of the river courses was mainly based on hydrological criteria. However, discretionary decisions also had to be made, because in some places the longer inflow is clearly not the more water-rich, while in other places the weighting of the discharge volumes would have required years of measurement series.
Principle of numbering
In order not to have to count a decimal multi-digit number of elements at any hierarchical level when numbering tributaries and river sections of a river system, which is a branched tree when viewed from the mouth, the German system of waterway indicators works with a large number of hierarchical levels: First of all In the entire course of the river and later in each of its sections, the maximum four largest tributaries are selected and designated with even end digits in ascending order downstream (-2, -4, -6, -8). The river sections delimited by their mouths are denoted by uneven end digits, also in ascending order downstream. The uppermost section of the river course (and in the next step its uppermost section, etc.) always gets the last digit '1'. The river section below the lowest inflow considered in the respective hierarchy level is usually given the final number '9'. The same procedure is then repeated for each river section defined in the first (in the following steps: the previous) division.
The sequence of numbers up to and including the last even digit is the water code of the respective hydrologically defined water body. The odd digits therefore only designate sections of water. If a water body code ends with a '1', this usually means that this body of water is the upper reaches of a longer body of water whose water body code is shorter by this one. Correspondingly, waters with the last digit '9' are usually lower reaches of longer waters. The extent of this lowest river section can differ significantly from the geographically, water-economically or traffic-technically defined lower reaches, especially the tidal waters and shipping lanes of the Unterems , Unterweser and Unterelbe .
Mileage and stationing
The hydrographic Kilometrierung's deployment and always goes upriver (possibly. Except for the Rhine), while the nautical Kilometrierung in some waters go down the river and in some upstream. If the entries of the water body numbers are sparse in a hydrological map, one can usually recognize from the continuation of the stationing what is defined as the main river at the confluence of two bodies of water. The stationing of the lower-ranking tributary begins at the confluence with zero. Sometimes, however, several stationings are entered in parallel on a river section.
The term "kilometrage" used here for the distance scale along a watercourse should not be taken literally, as the distances from the mouth are shown on detailed maps in 100-meter steps. In subject-specific texts, the attachment of distance scales along rivers and (see below) lake shores is referred to as stationing .
Lakes
Lakes are basically treated as part of a river consisting of a main inflow and outflow. There are lakes that have a section code (recognizable by the uneven final number) of the running water. Others are numbered over several inflows and outflows.
The stationing of the flowing water is continued through the lake, mostly not as the crow flies, but on a valley path running roughly in the middle between the right and left bank . Other tributaries are mostly kilometers upwards from the mouth of the lake, so that there is a gap between the line of the flowing water and the mouth of the tributary.
In addition, lakes are given bank kilometers that run clockwise around the lake starting from the discharge.
"Drainage" waters
Water body indicators for bodies of water without surface runoff are assigned according to the known or even suspected underground runoff path of their water. If the subterranean route is known exactly, the water code number and kilometrage can also be run through.
Coastal waters
In the coastal area, the principles agreed for inland waters and their tributaries were deviated from in different ways from state to state:
- In Lower Saxony, the principle of 'even numbers for bodies of water - odd numbers for bodies of water' was not strictly adhered to, but bays have been given numbers with an even last digit analogous to tributaries.
- In Mecklenburg-Western Pomerania the tributaries along the coastline were numbered according to the same rules as tributaries along a river, but the course of the coastline was defined in such a way that tributaries on opposite banks of an arm of the sea often have completely different third digits.
Waters without a code
It is not uncommon for classified waters to be followed by small tributaries in the form of rivulets or ditches for which no GCC has yet been assigned at the upper end of the classification and kilometrage, or at the side. In the case of bodies of water that are relevant for the water balance, a watercourse without a GKZ can definitely have a processing number of the responsible water and soil association .
Such bodies of water can certainly carry water continuously or almost continuously. Conversely, there are watercourses with a river code that often run dry.
Numbers and names
Where the hydrologically definable main river and traditional name contexts and name boundaries differed, decisions were made differently from case to case. In some places, waterway codes were assigned by name, at others the river course and the context of the code differ from one another. In some places, attempts have been made to adapt the geographical names (that is the term) to the hydrological definitions, especially in previously nameless source streams or in bodies of water where different names are traditionally used for short sections.
example
The Heusiepen stream in Remscheid has the water code number 27366462. The number can be broken down as follows:
- Electricity system / Rhine catchment area (2)
The Morsbach initially has the water code 273669 in its first section. It results from the catchment area 27366 (entire Morsbach) and the appended final number 9, which marks the mouth sections. Over the course of seven kilometers, numerous streams and rainwater canals flow into it, but the key figure does not change. This only happens with the confluence of the important Gelpe (area 273664) - the code number of the Morsbach is now 273663. After another three kilometers the Leyerbach (area 273662) joins and again the Morsbach receives a new number with 273661. The last digit 1 makes it clear that there are no more hydrologically significant ramifications and that this is the last section of the Morsbach.
Important waterway figures
With the exception of the Ems area, the list contains all up to three-digit key figures for entire bodies of water, plus four-digit numbers at least 50 km long tributaries of the first order and direct sea tributaries. Rivers in
italics run their entire length outside of Germany, but are included in the number sequence.
1 Danube
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 1 | Danube | 2857 | 817,000 |
| 112 | Lauchert | 60.3 | 456 |
| 114 | Iller (with Breitach - Turabach ) | 147 | 2.147 |
| 1158 | Gunz | 55 | 710 |
| 116 | Mindel | 81 | 962 |
| 1172 | Brenz | 52 | 880 |
| 118 | Wörnitz | 132 | 1,686 |
| 12 | Lech | 264 | 3,926 |
| 122 | Archbach (body of water in Austria, part of the catchment area in Germany) | 10 | 145 |
| 124 | Vils | 36 | 198 |
| 126 | Wertach (with Kaltenbrunnenbach ) | 141 | 1,441 |
| 128 | Lech Canal | 14th | 18.7 |
| 132 | Friedberger Ach (with Hagenbach–… –Lost Bach) | 100.4 | 598 |
| 134 | Pair | 134 | 1,632 |
| 136 | Evenings | 72 | 1,020 |
| 138 | Altmuehl | 234 | 2,251 |
| 1386 | Main-Danube Canal | 170.71 | |
| 14th | Naab (with Waldnaab ) | 165 | 5,432 |
| 142 | Haidenaab | 60 | 714 |
| 144 | Pfreimd (with Katharinabach ) | 56 | 595 |
| 146 | Schwarzach | 80 | 822 |
| 148 | Vils | 78 | 1,100 |
| 152 | Left arm of the Danube / rain | 3.6 | 2,881 |
| 1522 | rain | 191 | 2,878 |
| 154 | Patter | 37 | 262 |
| 156 | Big talk | 75 | 407 |
| 158 | Kinsach-Ferchenbach | 38 | 317 |
| 16 | Isar | 295 | 8,370 |
| 162 | Loisach | 113 | 1,090 |
| 164 | Amper (with Ammer, Linder , Fischbach, Rückentalbach) | 209 | 3,248 |
| 166 | Middle Isar Canal | 64.7 | 1,147 |
| 168 | Plattlinger Mühlbach (with Längenmühlbach ) | 75 | 345 |
| 172 | Hengersberger Ohe (with Ranzlinger Bach ) | 34 | 198 |
| 174 | Vils (with Big Vils ) | 110 | 1,445 |
| 176 | Große Ohe (with Gaißa -… - Geißleitenbach ) <! | 46 | 176 |
| 178 | Ilz | 62 | 850 |
| 18th | Inn | 517 | 26,130 |
| 182 | Mangfall (with Weißach ) | 58 | 1,099 |
| 184 | Alz (with Tyrolean Achen ) | 150 | 2,197 |
| 186 | Salzach | 225 | 6,700 |
| 188 | Red | 109 | 1,205 |
2 Rhine
In contrast to all other rivers (in central parts of Europe), the Rhine not only has nautical kilometers running downstream (this is the case with the majority of rivers), but also international hydrographic stationing. In addition, there is also the addressing of the Swiss water information system GEWISS, which runs in the manner of a classic stationing from the French border near Basel upstream through Lake Constance to the Alpine Rhine.
The two partial lakes of Lake Constance are identified as river sections of the Rhine by means of indicators with uneven final digits .
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 2 | Rhine | 1239 | 185,300 |
| 215 | Lake Constance : Obersee |
(GKZ: 215 + part of 217) 5,386 |
|
| 2152 | Argen with Upper Argen | 73 | 655 |
| 2154 | Shot | 59 | 815 |
| (216 is not assigned, the Rheinbrücke Konstanz the border from 215 to 217) | |||
| 217 | Seerhein - Untersee - Upper High Rhine | ||
| 2174 | beaver | 31 | 167 |
| 218 | Thur | 135 | 1,696 |
| 2198 | Wutach | 91 | 1,140 |
| 22nd | Aare | 288 | 17,709 |
| 232 | Meadow | 55 | 458 |
| 234 | Tiny | 93 | 1.406 |
| 236 | Murg | 80 | 466 |
| 2372 | Louder with Wieslauter | 74 | 382 |
| 2374 | Alb | 51 | 467 |
| 2376 | Pfinz | 60 | 450 |
| 2378 | Speyerbach | 60 | 596 |
| 238 | Neckar | 362 | 13,934 |
| 2394 | Weschnitz | 59 | 436 |
| 24 | Main (with white main ) | 572 | 27,292 |
| 242 | Regnitz (with Rednitz ) | 162 | 7,523 |
| 244 | Franconian Saale | 139 | 2,765 |
| 246 | Deaf | 129 | 1,810 |
| 248 | Nidda | 90 | 1,942 |
| 252 | Selz | 61 | 389 |
| 254 | Near | 125 | 4,067 |
| 256 | Whisper | 30th | 209 |
| 258 | Lahn | 246 | 5,925 |
| 26th | Moselle | 544 | 28,286 |
| 262 | Angry | 173 | 4,259 |
| 264 | Saar | 235 | 7,431 |
| 266 | Kyll | 142 | 845 |
| 268 | Alf | 52 | 358 |
| 2716 | Wied | 102 | 771 |
| 2718 | Ahr | 85 | 897 |
| 272 | victory | 155 | 2,857 |
| 2736 | Wupper | 116.5 | 813 |
| 274 | Erft | 107 | 1,838 |
| 276 | Dysentery | 219 | 4,485 |
| 2772 | Emscher | 83 | 775 |
| 278 | lip | 220 | 4,888 |
| 28 | Meuse | 874 | 33,000 |
| 282 | Rur | 165 | 2,361 |
| 284 | Schwalm | 35 | 268 |
| 286 | Niers | 118 | 1,381 |
3 Ems
Because of the small size of the river basin, small bodies of water are also high in the hierarchy. That is why waters with three-digit numbers are only listed in full here on the Unterems.
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 3 | Ems | 371 | 13,160 |
| 316 | Hessel | 39 | 213 |
| 318 | Bever | 39.5 | 217 |
| 32 | Werse | 67 | 762 |
| 332 | Munster Aa | 43 | 172 |
| 34 | Big Aa | 25th | 922 |
| 36 | Hare | 170 | 3,086 |
| 38 | Leda (m. Ohe and Sagter Ems ) | 75 | 1.917 |
| 388 | Jümme (m. Barßeler Tief and Soeste ) | 94 | 450 |
| 392 | Sauteler Canal | 23 | 181 |
| 394 | Oldersumer Sieltief (m. Fehntjer Tief (north) and western Flumm ) | 26th | 235 |
| 396 | Borßumer Canal | 4.4 | 129 |
| 397 | Dollart (including the estuary as a section of the river Ems) | ||
| 3974 | Dollart (as a bay south of the estuary of the Ems) | ||
| 398 | Knockster Tief (with Wiegoldsburer Riede) | 31 | 1351 |
| 399 | Outer Ems estuary |
4 Weser
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 4th | Weser | 451 | 41.094 |
| 41 | Werra | 300 | 4,497 |
| 412 | hazel | 26th | 331 |
| 414 | Ulster | 57 | 421 |
| 416 | Hörsel | 55 | 784 |
| 418 | Weirs | 36 | 452 |
| 42 | Fulda | 221 | 6,947 |
| 422 | Lilac | 22nd | 271 |
| 424 | Schlitz (upper course: Altefeld , GKZ: 4241) | 43 | 315 |
| 426 | Haune | 67 | 500 |
| 428 | Eder | 176 | 3,361 |
| 432 | Schede | 13 | 49 |
| 434 | No one | 17th | 40 |
| 436 | Sultry | 29 | 290 |
| 438 | Reiherbach | 11.5 | 35 |
| 44 | Diemel | 111 | 1,762 |
| 442 | Hoppecke | 35 | 92 |
| 444 | Twist | 41 | 447 |
| 446 | Warmth | 33 | 157 |
| 448 | Eat | 28 | 192 |
| 452 | Nethe | 50 | 460 |
| 454 | Lenne | 24 | 125 |
| 456 | Emmer | 62 | 535 |
| 458 | External | 26th | 109 |
| 46 | Werre | 72 | 1,485 |
| 462 | Bega | 44 | 377 |
| 464 | Aa (with Johannisbach) | 26th | 254 |
| 466 | Else | 35 | 416 |
| 468 | Rehmerloh-Mennighüffer Mühlenbach | 16 | 71 |
| 472 | Bückeburg Aue | 39 | 173 |
| 474 | Walk | 27 | 163 |
| 476 | Big floodplain | 85 | 1,522 |
| 478 | Steinhuder Meerbach | 29 | 356 |
| 48 | All | 260 | 15,744 |
| 482 | Oker | 128 | 1,834 |
| 484 | Feet | 98 | 918 |
| 486 | Örtze (with Aue and Wietze ) | 70 | 760 |
| 488 | rope | 281 | 6,512 |
| 492 | Ochtum (with Süstedter Bach ) | 45 | 917 |
| 494 | Wümme (lower reaches: Lesum , GKZ: 4949) | 118 | 1,585 |
| 496 | Hunte | 189 | 2,785 |
| 498 | Lune | 43 | 383 |
5 Elbe
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 5 | Elbe | 1094 | 148.268 |
| 52 | Moldova ( CZ ) | 430 | 28,090 |
| 5281 | bad | 103 | 1,829 |
| 532 | Eger | 316 | 5,614 |
| 538 | Black magpie | 179 | 5,705 |
| 54 | trough | 314 | 7,400 |
| 541 | Zwickauer Mulde | 167 | 2,352 |
| 542 | Freiberg Mulde | 124 | 2,981 |
| 549 | United Mulde | 147 | 7,400 |
| 56 | Saale | 413 | 23,719 |
| 562 | Loquitz | 34 | 364 |
| 564 | Unstrut | 192 | 6.364 |
| 566 | White magpie | 257 | 5,154 |
| 568 | Bode | 169 | 3,229 |
| 572 | Nuthe | 39 | 509 |
| 574 | Ehle | 40 | ? |
| 576 | Ears | 103 | 1,503 |
| 578 | Tangier | 33 | 480 |
| 58 | Havel | 334 | 23,858 |
| 582 | Spree | 400 | 10.100 |
| 584 | Nuthe | 52 | 1,935 |
| 586 | Plans | 57 | 639 |
| 588 | Rhin | 129 | 1,780 |
| 592 | Elde | 208 | 2,990 |
| 5934 | Jeetzel | 73 | 1.928 |
| 594 | Ilmenau | 107 | 2,852 |
| 5954 | Bille | 65 | 506 |
| 5956 | Alster | 56 | 581 |
| 5958 | Estonian | 62 | 364 |
| 596 | Lühe (with floodplain ) | 44 | 216 |
| 5974 | sturgeon | 78 | 1,781 |
| 598 | Oste | 153 | 1,711 |
6 Or
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 6th | Or | 866 | 118,861 |
| 674 | Lusatian Neisse | 254 | 4,297 |
| 68 | Warta ( PL ) | 808 | 54,529 |
| 696 | West or | 17 (in Germany) | |
7 artificial waterways
| number | Surname | Length [km] |
|---|---|---|
| 70301 | Datteln-Hamm Canal | 47 |
| 70501 | Dortmund-Ems Canal | 223 |
| 74001 | Rhine-Herne Canal | 45 |
| 75101 | Wesel-Datteln Canal | 60 |
9 coastal area
With the numbers 94 and 95, the symbolism of odd and even end digits, which is common in inland waters, is not adhered to.
| number | Surname | Length [km] |
Catchment area [km²] |
|---|---|---|---|
| 928 | IJssel with Oude IJssel = Issel | 205 | 1.208 (only Oude IJssel) |
| 9282 | Bocholter Aa | 56 | 536 |
| 9286 | Vechte | 182 | 5,740 |
| 934 | Westems | ||
| 94 | Coastal waters from Borkum to the Sahlenburger Watt | ||
| 942 | Jade Bay | ||
| 95 | Coastal waters from the Sahlenburger Watt to the Danish border | ||
| 952 | Eider | 188 | 3,275 |
| 96 | Baltic Sea | ||
| 962 | Trave | 114 | 2,676 |
| 964 | Warnow | 155 | 3,324 |
| 9652 | Recknitz | 88 | 669 |
| 966 | Peene | 120 | 5.110 |
| 9664 | Tollense | 96 | 1,829 |
| 9666 | Trebel | 87 | 956 |
| 968 | Uecker (upper course Ucker ) | 98 | 2,200 |
Water body numbers
The German waterway network is also divided into water bodies , completely independent of the watercourse indicators tracing the hierarchy trees in the river systems as a watercourse identifier . Their identification numbers are assigned by the individual federal states independently of one another. A letter code in front of the sequence of digits reveals the type of body of water in addition to the responsible federal state. The letter identification is indispensable for communication at federal and European level; at regional level it is often left out. Usually the first two digits stand for a river basin, within which the remaining three digits are assigned without a fixed system.
Examples:
- The Wümme - and thus indirect Weser - inflow Deichschlot with the water body number 49456 has the number DE_RW_DENI_24047 as a water body. Here RW is running water , so rivers and DENI for Lower Saxony.
- The Elbe tributary Medem with the water code number 5994 has the number DE_RW_DENI_31029 as a water body.
- The White Elster - and thus the indirect Elbe tributary Erlbach with the water body number 56652 - has the number DE_RW_DETH_20872 as a water body
literature
- State Office for Water and Waste North Rhine-Westphalia (Hrsg.): Area name and list of waters in North Rhine-Westphalia
See also
- Water index - international overview
- Order (waters) , classification according to economic importance
Web links
- Federal and State Working Group on Water (LAWA)
- Explanation of the water body number in the Bavarian State Office for the Environment
-
Environmental maps of Lower Saxony , can be called up via the Layer Manager:
- in the "Hydrology" menu, among others
- "Water network" (here with waterway indicators)
- "Hierarchical area directory 1" to "4" (with boundaries of the catchment areas defined according to GKZ)
- in the menu "Water Framework Directive" (scroll the heading bar all the way to the right!) among other things
- "Water network" (here without water code numbers)
- "Water body catchment areas" (boundaries with numbers of the water bodies)
- in the "Hydrology" menu, among others
Individual evidence
- ↑ ATKIS object type catalog, object area waters , object type: stream, river, stream
- ↑ Geoportal Baden-Württemberg: Topic sheet "Fließgewässernetz" ( Memento of the original from 23 May 2016 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. → attributes
- ↑ NRW environmental data on site,
- ↑ LFU Bavaria, water registers → Lech (PDF)
- ↑ a b c d LfU Bavaria, water registers → river area Lech to Naab
- ↑ a b LfU Bavaria, water registers → Naab river area
- ↑ LfU Bavaria, water registers → Danube from the Naab to the Isar
- ↑ (with Black and Big Rain )
- ↑ Page no longer available , search in web archives: Swiss Federal Office for the Environment FOEN
- ^ Formal: Ems from Siel and Schöpfwerk Borßum to Siel and Schöpfwerk Knock
- ↑ WSA Emden: Unterems, "South of Emden it flows through the Dollart"
- ↑ State Gazette for the State of Hesse, No. 63
- ↑ State Gazette for the State of Hesse, No. 63
- ↑ a b Environment Lower Saxony - Area Directory Weser
- ↑ sachsen.de, Hydrological Manual → Part 2_Gebietskennzahlen [Download; * .pdf, 120 kB]
- ↑ Water body 20872 Erlbach (Weisse Elster), 38.8 km (PDF) , GKZ 56652, all flow paths under 23 km
