© Acta hydrotechnica 21/34 (2003), Ljubljana
ISSN 1581-0267
23
UDK/UDC: 504.4:556.18:556.5:911.2 (497.14) Prejeto/Received: 12. 10. 2003
Strokovni članek – Professional paper Sprejeto/Accepted: 18. 3. 2004
DOLOČITEV EKOHIDROGRAFSKIH OBMO ČIJ
V REPUBLIKI SLOVENIJI
DETERMINATION OF ECOHYDROGRAPHICAL
REGIONS IN SLOVENIA
Mitja BRILLY, Lidija GLOBEVNIK, Andrej VIDMAR
Direktiva Evropske unije o politiki do voda (WFD) daje podlago za zaš čito in izboljšanje vodnega
okolja. Vodna telesa površinskih voda je treba dolo čiti po kategorijah in jih lo čiti po tipih. V članku
je prikazan osnutek razvrstitve vodotokov in jezer v Sloveniji na tipe ekohidrografskih obmo čij.
WFD predvideva dva na čina dolo čanja tipov vodotokov: sistem A po Illiesu, na podlagi ekoregij,
prikazanih v Prilogi 1 WFD, in sistem B. Sistem B omogo ča upoštevanje posebnosti posamezne
države s pomo čjo obveznih in neobveznih dejavnikov. Pri upoštevanju sistema B moramo dose či
enako lo čljivost tipov, kot bi jo dosegli s sistemom A. Meje ekoregij na karti sistema A v WFD niso
dovolj razlo čne in se ne pokrivajo z mejami pore čij. Slovenija je razdeljena na dve ali štiri
ekoregije. Sistem B je upoštevan z ekohidrografskimi obmo čji, od katerih smo tri obmo čja dolo čili
na podlagi homogeniziranih obveznih dejavnikov. Obvezni dejavniki dolo čajo glavne vodotoke s
prispevno površino ve čjo od 1000 km in jezera. Tipe manjših vodotokov dolo čamo na podlagi
ekohidrografskih regij. Tipe vodotokov (za oboje glavne in manjše) nato opredelimo na osnovi
neobveznih dejavnikov – transport plavin in sestava substrata. Slovenijo smo razdelili na sedem
ekoregij: tri v pore čju Jadranskega morja in štiri v pore čju reke Donave. Meje ekoregij so
opredeljene na podlagi meja prispevnih površin vodotokov. Glavna dejavnika za dolo čanje
ekohidrografskih obmo čij sta: nadmorska višina na goratih obmo čjih in geološke formacije na
obmo čjih z izrazitimi kraškimi pojavi.
Klju čne besede: direktiva o politiki do voda, tipi površinskih vodotokov, ekoregije
The European Union Water Framework Directive (WFD) provides the framework for protection
and improvement of the aquatic environment. Surface water bodies should be classified into
categories and differentiated according to type. A method for the differentiation of rivers and lakes
in Slovenia into different types of ecohydrographical regions is presented in the paper. The WFD
provides a two-fold characterisation of surface body types: System A according to Illies with
ecoregions presented in Annex XI of WFD, and System B, which gives the grounds for
consideration of specific country conditions according to obligatory and optional factors. The same
degree of differentiation should be achieved by System B as by System A. The contours on the map,
provided by WFD for System A, are rather vague and do not coincide with the contours of
watersheds. They divide the territory of Slovenia into two and four ecoregions, respectively. System
B implements ecohydrographical regions, which are regions with homogenized obligatory factors.
Obligatory descriptors define large rivers with watersheds larger than 1000 km
2
, and lakes. Small-
sized rivers are differentiated according to ecohydrographical regions. Types of rivers (both large
and small) are then determined by the optional descriptors: transport of sediment and substratum
composition. The country is subdivided into seven ecohydrographical regions: three in the Adriatic
Sea basin and four in the Danube River basin. Watershed borders determine the boundaries of
ecohydrographical regions. The main factors for determination of ecohydrographical regions are
altitude for alpine regions and geology for regions with predominantly karst phenomena.
Key words: Water Framework Directive, surface water body types, ecoregions

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Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
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1. UVOD
Direktiva o politiki do voda je za čela veljati
leta 2000. Eden od glavnih ciljev je doseganje
dobrega stanja površinskih voda do leta 2015
za razli čne kategorije površinskih vodnih teles:
vodotokov, jezer, tranzicijskih in obalnih voda.
Kategorije vodnih teles so razvrš čene na tipe,
njihov dober ekološki status pa je opredeljen
glede na tip vodnega telesa. V tem prispevku
razpravljamo samo o razvrstitvi vodotokov. V
Sloveniji imamo samo dve naravni jezeri in
ve č umetnih zadrževalnikov s površino, ve čjo
od 0,5 km. Obalne in tranzicijske vode se
nahajajo v eni regiji.
Temeljni problem je dolo čanje dobrega,
nespremenjenega, naravnega ekološkega stanja
vodotokov glede na razli čne pogoje v okolju.
Pri tem se sre čamo s pomanjkljivimi
biološkimi podatki in raziskavami podlag za
potrebe WFD. Naš sistem smo razvili na
podlagi obstoje čih abiotskih in terestri čnih
biotskih regionalizacij, vklju čno z nekaterimi
vodnimi biotopi (Brilly et al., 2001).
Vodotoke smo razvrstili glede na velikost
njihove prispevne površine z uporabo
državnega šifranta vodotokov (slika 1; Brilly,
2000; Šraj, 2001). Velikost je avtomati čno
dolo čena z GIS-i in pridruženo bazo podatkov
(preglednica 1).
Ve čina vodnih teles vodotokov je v
kategoriji srednjih in malih vodotokov, ki so
zunaj uradnega državnega sistema
monitoringa. Ta vodna telesa so tesno
povezana tudi z okoliškimi terestri čnimi
ekološkimi sistemi in so tudi odvisna od teh
sistemov.
Posamezna država lahko izbere med dvema
sistemoma za razvrš čanje vodnih teles na tipe:
sistem A z ekoregijami, prikazanimi na karti v
prilogi WFD, ali sistem B z enako stopnjo
razvrš čanja in z uporabo abioti čnih obveznih
in neobveznih dejavnikov. Za vsak tip
vodnega telesa je treba dolo čiti posebne
biološke referen čne pogoje.
1. INTRODUCTION
The Water Framework Directive has
entered into force in 2000. Until 2015, one of
the major tasks will be to achieve a good
surface water status for the different categories
of water bodies: rivers, lakes, transitional, and
coastal waters. The categories of the surface
water bodies are differentiated into types and
their ecological status is described according
to type. In this paper, only the differentiation
of rivers is discussed. In Slovenia, there are
only two natural lakes and several artificial
storages with a surface larger than 0.5 square
kilometre. The coastal and transitional waters
are present in one region.
The main question is the definition of a
good, undisturbed ecological status of the
rivers according to different environmental
conditions. What is lacking is the collection of
biological data and thorough background
research done within the framework of WFD.
The developed system is based on the existing
abiotic and terrestrial biotic regionalizations,
including some aquatic biota (Brilly et al.,
2001).
In Figure 1, the rivers are separated
according to the catchment size, by using the
country coding system (Brilly, 2000; Šraj,
2001). The sizing was done automatically by
GIS and an associated database (Table 1).
The majority of river water bodies are in the
categories of medium and small-sized rivers
that are outside the official national monitoring
system. Moreover, the water bodies are in
close relationships with the surrounding
terrestrial ecosystems, and are dependent upon
them.
A country may choose among two systems
for the differentiation of water bodies by type:
System A with ecoregions in accordance with
the map enclosed in the annex of WFD, or
System B with the same degree of
differentiation and incorporating abiotic
obligatory and optional descriptors. Specific
biological reference conditions should be
developed for each water body type.

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Slika 1. Šifrant prispevnih obmo čij v Republiki Sloveniji (Šraj, 2001).
Figure 1. The River watershed coding system in the Republic of Slovenia (Šraj, 200 1).

Brilly, M. et al.: Dolo čitev ekohidrografskih obmo čij v Republiki Sloveniji –
Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
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Preglednica 1. Reke.
Table 1. Rivers.
reke – razvrš čene po velikosti prispevne površine
River size typology based on the area of watershed
dolžina [km]
Length [km]
zelo velike – very large: > 10 000 km
2
244
velike – large: 1000–10 000 km
2
391
srednje – medium: 100–1000 km
2
1485
majhne – small: 10–100 km
2
2086
SKUPNO – TOTAL SUM 4206
Preglednica 2. Sistem A v skladu s prilogo XII WFD.
Table 2. System A according to Annex II, WFD.
dolo čena tipologija – Fixed typology opisi – Descriptors
ekoregija – Ecoregion ekoregije so prikazane na karti A v prilogi XI
Ecoregions shown on Map A in Annex XI
tip – Type nadmorske višine – Altitude typology:
        visoko – high: > 800 m;
        srednje nadmorske višine – mid-altitude: 200–800 m;
        nižine – lowlands: < 200 m
obseg, dolo čen na osnovi povpre čne površine –
Size typology based on watershed area:
        majhen – small: 0,5–1 km
2
;
        srednji – medium: 1–10 km
2
;
        velik – large: 10–100 km
2
;
        zelo velik – very large > 100 km
2
Geologija – Geology:
        apnen časta – calcareous;
        silikatna – siliceous;
        organska – organic.
Preglednica 3. Rezultati razvrš čanja vodotokov po tipih.
Table 3. System A: Results of the river body differentiation on types.
ekoregija – Ecoregion razli čica I
variant I
razli čica II
variant II
Italija (3) – Italy (3) 4
Alpe (4) – Alps (4) 77
Dinarski zahodni Balkan (6) – Dinaric western Balkan (6) 71 0
madžarsko nižavje (11) – Hungarian lowlands ( 11) 8
vsota – Sum total 26 17

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2. SISTEM A – EKOREGIJE
POVRŠINSKIH VODA
Razdelitev Slovenije na podlagi sistema A
mora biti izdelan skladno z raziskavami, ki jih
je izvedel Illies (1978), in so prikazane na karti
v dodatku XIA WFD (EU, 2000). Na karti je
prikazana celotna Evropa, zato meje ekoregij
niso natan čno dolo čene. Karto smo prikazali v
manjšem merilu z dvema ekoregijama: z
Alpami in dinarskim zahodnim Balkanom
(slika 2).
Na sliki 2 so prikazane tudi glavne
geografske enote Slovenije: Alpe,
Sredozemlje, Dinaridi in Panonija. Obe
regionalizaciji nista v soglasju z mejami med
pore čji. Vprašanje je tudi, ali bi bilo treba
upoštevati tudi bližnje ekoregije: madžarsko
nižavje in Italijo. Sistem A tudi vklju čuje
obvezne lastnosti (preglednica 2).
Izdelali smo dve razli čici delitve za tipe
vodotokov po sistemu A:
1. Prvo razli čico I, s štirimi ekoregijami
(slika 3): Italija, Alpe, dinarski zahodni
Balkan in madžarsko nižavje; in
2. Drugo razli čico II z dvema ekoregijama
(slika 4): Alpe in dinarski zahodni
Balkan.
Tipi vodotokov so lo čeni glede na velikost
prispevne površine in nadmorsko višino.
Geološke formacije so ve č ali manj
apnen časte, z izjemo dela na severovzhodu
države. Rezultati razvrš čanja so prikazani v
preglednici 3.
Razvrš čanje vodotokov v skladu z razli čico
I vsebuje 26 tipov vodotokov ter je bolj
prilagodljivo in v skladu z geografsko
regionalizacijo, medtem ko ima razli čica II
samo 17 tipov. Slovenski vodotoki pripadajo
pore čjema Donave in Jadranskega morja, toda
sistem A ne vklju čuje te meje na karti
ekoregij.
2. SYSTEM A – ECOREGIONS FOR
SURFACE WATERS
The division of Slovenia according to
System A should be carried out in accordance
with the research carried out by Illies (1978),
as presented on the map in Annex XIA of
WFD (EU, 2000). The entire Europe is
presented on the map and, thus it cannot be
presented in detail. We transposed the map
into a smaller scale map with two ecoregions:
the Alps and the Dinaric western Balkan
(Figure 2).
In Figure 2, major geographical units of
Slovenia are presented: the Alps, the
Mediterranean, the Dinaric Alps and the
Pannonian plain. Both regionalizations are in
discrepancy with the existing watershed
borders. On the other side, the question is,
whether the surrounding ecoregions should
also be considered: the Hungarian lowlands
and Italy. System A also includes some
obligatory descriptors (Table 2).
Two variants of watercourse types in
accordance with System A were derived:
1. A first one I, with four ecoregions
(Figure 3): Italy, the Alps, the Dinaric
western Balkan and Hungarian
lowlands, and
2. A second one II with two ecoregions
(Figure 4): the Alps and the Dinaric
western Balkan.
The river body t ypes are differentiated
according to the watershed area and altitude.
The geology is predominantly calcareous,
except on the north-eastern part of the country.
Results of the differentiation are presented on
Table 3.
Differentiation of water bodies according to
variant I includes 26 watercourse types. It is
more flexible and in accordance with the
geographical regionalization. On the other
hand, variant II includes only 17 types.
Slovenian rivers belong to the basins of the
Danube River and the Adriatic Sea, however,
within System A the border  is not included on
the map of ecoregions.

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Slika 2. Ekoregije v Sloveniji.
Figure 2. Ecoregions in Slovenia.

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Slika 3. Ekoregije v Sloveniji: sistem A, varianta I.
Figure 3. Ecoregions in Slovenia: System A, variant I.

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Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
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Slika 4. Ekoregije v Sloveniji: sistem A, varianta II.
Figure 4. Ecoregions in Slovenia: System A, variant II.

Brilly, M. et al.: Dolo čitev ekohidrografskih obmo čij v Republiki Sloveniji –
Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
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3. SISTEM B –
EKOHIDROGRAFSKE REGIJE
Sistem B je v primerjavi s sistemom A bolj
prilagodljiv in upošteva naravne pogoje.
Porazdelitev mora upoštevati obvezne
dejavnike po WFD in takšne neobvezne
dejavnike, da lahko razlo čimo zna čilne
abiotske vplive. Dosežena lo čljivost mora biti
enaka, kot bi jo dosegli s sistemom A.
Pri uporabi sistema B smo upoštevali:
• Študijo o sestavi in ogroženosti ribje
populacije v Sloveniji (Bertok et al.,
2000), ki državo zelo jasno deli na del, ki
pripada pore čju Jadranskega morja, in del,
ki pripada pore čju Črnega morja.
• Da ima Slovenija znano, prostrano,
posebno obmo čje krasa, ki zahteva
posebno pozornost.
• Uradni državni monitoring vsebuje tudi
biološke podatke o velikih rekah.
Omenjena izhodiš ča in rezultati analiz
razvrš čanja po sistemu A so bili dobra podlaga
za uporabo sistema B. Država je bila
razdeljena na regije, imenovane
ekohidrografske regije za razvrš čanje tipov
majhnih in srednjih vodotokov. Velike
vodotoke smo opredelili lo čeno ob
upoštevanju vodnega režima in podatkov
monitoringa. Ekohidrografske regije, dolo čene
glede na omenjena izhodiš ča in obvezne
dejavnike (preglednica 4 in slika 5), so:
1. alpska ekohidrografska regija pore čja
Jadranskega morja;
2. alpska ekohidrografska regija pore čja reke
Donave;
3. kraška ekohidrografska regija pore čja
Jadranskega morja;
4. kraška ekohidrografska regija pore čja reke
Donave;
5. predalpska ekohidrografska regija;
6. panonska ekohidrografska regija in
7. primorska ekohidrografska regija.
3. SYSTEM B –
ECOHYDROGRAPHICAL
REGIONS
In comparison to System A, System B is
more flexible and considers specific natural
conditions. The differentiation should consider
obligatory descriptors according to WFD and
such optional descriptors that would enable the
identification of specific abiotic influence. The
degree of differentiation should be the same as
that found in the differentiation, which uses
System A.
While implementing S ystem B, the
following has been taken into account:
• Studies on composition and abundance of
fish fauna in Slovenia (Bertok et al., 2000),
which clearly divides the country into the
part belonging to the Adriatic Sea River
Basin and the part belonging to the Danube
River Basin.
• Slovenia has a renowned, wide karst
region, which needs special treatment.
• The official country monitoring s ystem
provides data about biota for large rivers.
These points of departure and the results
from the analyses of differentiation according
to System A were a starting points to develop
a System B classification. The country is
subdivided into regions, i.e. into
ecohydrographical regions for differentiation
of small and medium-sized rivers. Large rivers
are differentiated separately according to water
regime and monitoring data. The
ecohydrographical regions defined in
accordance with the points of departure given
above and the obligatory factors (Table 4 and
Figure 5) are:
1. Alpine ecohydrographical region of the
Adriatic Sea River Basin;
2. Alpine ecohydrographical region of the
Danube River Basin;
3. Karst ecohydrographical region of the
Adriatic Sea River Basin;
4. Karst ecohydrographical region of the
Danube River Basin;
5. Perialpine ecohydrographical region;
6. Hilly and plain ecohydrographical region
and
7. Mediterranean ecohydrographical region.

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Slika 5. Ekoregije v Sloveniji – sistem B.
Figure 5. Ecoregions in Slovenia: System B.

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Determination of Ecohydrographic Regions in Slovenia
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Preglednica 4. Sistem B v skladu s prilogo II.
Table 4. System B according to Annex II.
nadomestna opredelitev –
alternative characterisation
Fizikalni in kemijski dejavniki, ki dolo čajo zna čilnosti reke ali
dela reke in s tem strukturo in sestavo populacij – Physical and
chemical factors that determine the characteristics of the river or
part of the river and hence the biological population structure and
composition
obvezni dejavniki –
obligatory factors
nadmorska višina – altitude
zemljepisna širina – latitude
zemljepisna dolžina – longitude
geološka podlaga – geology
velikost – size
izbirni dejavniki –
optional factors
 oddaljenost od re čnega izvira – distance from river source
 energija toka (funkcija pretoka in strmca) – energy of flow
(function of flow and slope)
 povpre čna širina vode v strugi – mean water width
 povpre čna globina vode v strugi – mean water depth
 povpre čni strmec – mean water slope
 oblika in konfiguracija glavne re čne struge – form and shape of
main river bed
 kategorija pretoka (toka) reke – river discharge (flow) category
 oblika doline – valley shape
 transport plavin – transport of solids
 sposobnost nevtralizacije kislin – acid neutralizing capacity
 povpre čna sestava substrata – mean substratum composition
 kloridi – chloride
 razpon temperature zraka – air temperature range
 povpre čna temperatura zraka – mean air temperature
 padavine – precipitation
Kon čna razdelitev vodnih teles vodotokov
upošteva dodatne neobvezne dejavnike, kot sta
transport plavin in povpre čna sestava
substrata. Povpre čna sestava substrata bolj ali
manj vklju čuje integrirane vplive drugih
neobveznih dejavnikov, kot so: razdalja od
izvira, energija toka (funkcija pretoka in
nagiba), povpre čna širina vodne gladine,
povpre čna globina vode, povpre čni nagib
gladine vode, oblika in razsežnost glavne
struge, pretok vode, kategorija oblike doline in
transport trdih delcev materiala. Kriterij za
razvrš čanje na tipe, na podlagi povpre čne
sestave substrata, je matriks, ki vklju čuje
kompaktne kamenine, gramoz, pesek ali mulj.
Drugi neobvezni dejavnik, tj. transport
plavin, na podoben na čin kot povpre čna
The final differentiation of river water bodies
has taken into account additional optional
factors, such as the transport of solids and
mean substratum composition. The mean
substratum composition includes the integrated
influence of other optional factors, such as:
distance from river source, energy of flow
(function of flow and slope), mean water
surface width, mean water depth, mean water
slope, form and shape of main river bed, river
discharge, category of valley shape, and
transport of solids. The criterion used for
differentiation among types by means of
substratum composition is a matrix that
includes compact rocks, gravel, sand and silt.
The second optional factor, i.e. the transport
of solids, similarly integrates the influence of

Brilly, M. et al.: Dolo čitev ekohidrografskih obmo čij v Republiki Sloveniji –
Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
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sestava substrata tudi integrira vplive ve č
drugih dejavnikov. Kriterij za razvrš čanje je
pojav letnega transporta plavin.
Velike vodotoke lo čimo na:
(1.1) – Reki Drava in Mura s prevladujo čimi
silikatnimi geološkimi formacijami na pore čju,
gramoznim substratom, pojavom
prodonosnosti in prevladujo čim odtokom
zaradi tajanja snega.
(1.2) – Reki Sava in Savinja z apnenci v
geološki sestavi pore čja, gramoznim
substratom in transportom plavin.
(1.3–1.8) – Reke Ljubljanica, Unec, Kolpa in
Krka s kraško geologijo in z razli čno
oblikovanim substratom in delno brez
transporta plavin.
(1.9) – Reka So ča pripada pore čju Jadranskega
morja z gramoznim substratom in pojavom
transporta plavin.
Kon čna razporeditev malih in srednjih
vodotokov je zaradi pomanjkljivih podatkov
zgolj ocenjena. Izra čunali smo teoreti čno
razporeditev (na najve čje možno število tipov),
pri čakovano število tipov na podlagi izkušenj,
ki mora biti potrjeno s terenskimi ogledi, in
minimalno pri čakovano število tipov
(preglednica 5).
other factors, such as the mean composition of
substratum. The criterion for differentiation is
the yearly transport of solids.
Large rivers in Slovenia are differentiated
into:
(1.1) – The Drava and the Mura Rivers with
predominant silicate geology on the watershed,
gravel composition of substratum, existing solid
transport and predominant snowmelt runoff.
(1.2) – The Sava River and the Savinja River
with calcareous geology, gravel composition of
substratum and existing solid transport.
(1.3–1.8) – The Ljubljanica, Unec, Kolpa and
Krka rivers within the karst region and with a
different composition of substratum; the
sediment load is partially disconnected.
(1.9) – The So ča River belongs to the Adriatic
Sea River Basin with gravel substratum and
solid transport.
Given the current lack of data, only an
estimation of the final differentiation of small
and medium-sized rivers can be made. We
have calculated the theoretical differentiation
(the maximum possible number of types), the
expected number of types based on experience
(that should be further confirmed by site
visits), and the minimum expected number of
types (Table 5).
Preglednica 5. Pregled tipov srednjih in manjših vodotokov po ekohidrografskih obmo čjih.
Table 5. Differentiation of small and medium-sized rivers by ecohydrographical regions.
število tipov – oznaka obmo čja – Region No. skupaj –
Number of types 1234567 Sum total
po velikosti – by size 2222222 –
po sestavi dna – by substratum composition 2244434 –
po premeš čanju plavin – by transport of solids 2222222 –
teoreti čno – theoretical 8 8 16 16 16 12 8 84
pri čakovano – expected 5448766 4 0
glavni tipi – basic types 4––5343 1 9
4. RAZPRAVA IN
ZAKLJU ČKI
1. Sistem A, namenjen razlo čevanju vodnih
teles vodotokov na tipe, lo či 11 tipov
vodnih telesov vodotokov ob upoštevanju
4. DISCUSSION AND
CONCLUSIONS
1. System A, used for the differentiation of
river water bodies by t ype, differentiates
river water bodies into 11 types

Brilly, M. et al.: Dolo čitev ekohidrografskih obmo čij v Republiki Sloveniji –
Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
35
dveh ekoregij in 26 tipov ob upoštevanju
štirih ekoregij. Sistem A ne upošteva meje
med jadranskim in donavskim pore čjem
kot tudi ne posebnega in obsežnega
kraškega obmo čja.
2. Sistem B se bolje prilagaja naravnim
razmeram kot sistem A. O tem po obsežni
razpravi soglašajo tudi strokovnjaki.
Najve čje število tipov, opredeljenih po
sistemu B, je 84, in najmanjše število
glavnih tipov znaša 19. Pri čakovano
število tipov vodnih teles vodotokov pa
znaša 40.
3. V kratkem času bo treba opraviti še veliko
raziskav za dolo čanje bioloških referen čnih
pogojev za vsak tip. Obstaja tudi veliko
pomanjkanje podatkov za majhne in
srednje vodotoke za lo čevanje in
opredelitev dobrega statusa.
considering two ecoregions, and into 26
considering four ecoregions, respectively.
System A does not take into consideration
the watershed border between the Adriatic
River basin and the Danube River basin,
nor the specific karst region.
2. System B is more flexible and is able to
relate to natural conditions more closely
than System A. Several expert discussions
have supported this conclusion. The
maximum number of types, differentiated
by S ystem B, is 84, and the minimum
number of basic types of water bodies is
19. The expected number is 40.
3. An extensive investigation of describing
the biological reference conditions for each
type should be undertaken in a short time
period. Furthermore, for small and
medium-sized rivers there is a lack of data,
which restrains the ability to correctly
categorize and define an ecologically good
status.
VIRI – REFERENCES
Bertok, M., Budihna, N., Zabric, D. (2000). Kategorizacija slovenskih teko čih in stoje čih voda z
vidika sladkovodnega ribištva. Prva faza – Jadransko pore čje (Classification of running and
stagnant fresh waters considering fishery. First phase – The basin of the Adriatic Sea).
Unpublished report (in Slovenian).
Brilly, M. (2000). The Danube and its basin. Follow-up Vol.6, A hydrological monograph. Pt. 1,
Danube river basin coding (Dunaj i ego bassejn. Dopolnitel´nyj t. 6, Gidrologi českaja
monografija. Čast´ 1, Sistema kodov bassejna reki Dunaj = Die Donau und ihr Einzugsgebiet.
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ekoregij v Sloveniji kot podlaga za gospodarjenje z vodami (Differentiation of ecoregions in
Slovenija as a starting point for water management). Unpublished report, University of
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EU (2000). WFD Directive 2000/60/EC of the European Parliament and of the Council of 23
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Brilly, M. et al.: Dolo čitev ekohidrografskih obmo čij v Republiki Sloveniji –
Determination of Ecohydrographic Regions in Slovenia
© Acta hydrotechnica 21/34 (2003), 23–36, Ljubljana
36
Naslovi avtorjev – Authors’ Addresses
prof. dr. Mitja Brilly
Univerza v Ljubljani – University of Ljubljana
Fakulteta za gradbeništvo in geodezijo – Faculty of Civil and Geodetic Engineering
Jamova 2, SI-1000 Ljubljana
E-mail: mbrilly@fgg.uni-lj.si
mag. Andrej Vidmar
Univerza v Ljubljani – University of Ljubljana
Fakulteta za gradbeništvo in geodezijo – Faculty of Civil and Geodetic Engineering
Jamova 2, SI-1000 Ljubljana
E-mail: avidmar@fgg.uni-lj.si
dr. Lidija Globevnik
Inštitut za vode Republike Slovenije – Institute for Water of the Republic of Slovenia
Hajdrihova 28, SI-1000 Ljubljana
E-mail: lidija.globevnik@guest.arnes.si