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Skrivnosti Sorškega polja: Gramozno jezero Traditional Cache

Hidden : 8/24/2024
Difficulty:
1 out of 5
Terrain:
2 out of 5

Size: Size:   regular (regular)

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Geocache Description:


SLO:

Med Škofjo Loko, Kranjem in Medvodami, med Soro, Savo in železico, tam se nahaja Sorško polje, polno drobnih kotičkov, katere ne opazimo, ali pa gremo mimo njih. 

Skrito v dolini in med drevesi se nahaja Gramozno jezero, oz. eni ga kličejo kar Ribnik. Sedaj jezero sameva, mimo njega gredo le kakšni sprehajalci, kolesarji ali mogoče kakšen bager in tovornjak. Domačini ga poznajo, saj so se v njem včasih kopali in lovili ribe. Jezero ni nastalo po naravni poti. Ima peščeno dno, ker so včasih na tem območju izkopavali pesek, Leta 1986 so za potrebe HE Mavčiče zajezili reko Savo. Takrat se je luknja začela polniti s podtalnico in nastalo je tole jezero vse do gladine, enake reki Savi nad jezom HE Mavčiče. Tako je bil vodostaj več metrov višji kot sedaj in je bila dolina bolj polna vode. 

Vodostaj ribnika je pričel upadati, verjetno zaradi vse večje neprepustnosti akumulacijskega jezera HE Mavčiče, zaradi nabiranja mulja na dnu. Vodostaj je upadel za več metrov, ribnik pa ima danes največjo globino 3 m. Nekoč je površina ribnika znašala 3 ha, danes pa je le območje velikosti 0,7 ha. Zelo nenavadna značilnost jezera je visoka vsebnost raztopljenega kisika v vodi, zaradi česar je v njem nekoč prebivala potočna postrv.

 

ENG:

Between Škofja Loka, Kranj and Medvode, between Sora, Sava and the railway, there is the Sorško polje, full of tiny interesting corners that we don't notice or pass them by.

Hidden in the valley among the trees is the Gramozno jezero (Gravel Lake), or some call it Ribnik (pond). Now the lake islittle forgoten, only some walkers, cyclists or maybe an excavator and a truck pass by it. Locals know it because they used to swim and caching fish in it. The lake was not created naturally. It has a sandy bottom because they used to dig sand in this area. In 1986, the Sava River was dammed for the needs of HPP Mavčiče. At that time, the hole began to fill with groundwater and this lake was created up to the level of the Sava River above the HPP Mavčiče dam. So the water level was several meters higher than now and the valley was more full of water.

The water level of the pond began to drop, probably due to the increasing impermeability of the HP Mavčiče reservoir lake, due to the accumulation of silt at the bottom. The water level has dropped by several meters, and today the pond has a maximum depth of 3 m. Once the area of ​​the pond was 3 ha, but today it is only an area of ​​0.7 ha. A very unusual feature of the lake is the high content of dissolved oxygen in the water, due to which brook trout once lived in it.

Additional Hints (Decrypt)

Uvšxn an qerirfh, imrzv anwcerw ira qin žroywn/gerr ubhfr, gnxr gjb anvyf bhg svefg

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)