Planota Grabovica je korozijska uravnava v južnem delu Bosne in Hercegovine. Za celotno območje je značilen pretočni kras, kjer podzemni tokovi, ki ponikajo na Duvanjskem polju, odtekajo v smeri ...izvirov na Livanjskem polju. V tej raziskavi smo izdelali morfografske in morfometrične analize površinskih in podzemskih oblik, predvsem udornic, denudiranih jam ter aktivnih in reliktnih jamskih sistemov. Interpretirali smo morfogenezo in preteklo hidrološko delovanje proučevanega območja.
Suvremena vodoopskrba riječkog područja Grbac Žiković, Renata; Orešić, Danijel; Čanjevac, Ivan
Geoadria,
01/2017, Letnik:
14, Številka:
2
Journal Article, Web Resource
Recenzirano
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The area of Rijeka's water supply system belongs to karst which is featured with a significant underground water circulation, as well as with a high sensitivity to external influences such as water ...pollution. Abundant springs are the basis of water supply. The minimal spring abundance exceeds the water consumption for several times. The quality of water is good, supplying more than 200.000 residents of the Rijeka area, and since lately the northern part of Krk Island. The article studies the development of Rijeka's water supply system, with an emphasis on the water consumption and the level of water supply system's development in the last fifteen years. The data shows a high level of development of the water supply system. Lately there has been a decrease in water consumption in the researched area, particularly in economic sector due to many industries being shut down. Today approximately 2/3 of consumption accounts for households. In spite of redistribution of population within the researched area (the process of suburbanization) there was no significant decrease in water supply standard. Moreover, lately there have been considerable advances in reducing the losses in the water supply network.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The book is the result of joint work and many years of mutual cooperation between researchers from Slovenia and Croatia. It was made as part of the transboundary project ŽIVO! Življenje – voda! (Life ...– Water!) (IPA CBC SI-HR 2007-2013), which involved the participation of authors from project partner institutions as well as invited authors who are familiar with the characteristics of the karst area of Northern Istria and the conditions there relating to drinking water supply. The monograph presents the natural features of Northern Istria, the karst and karst phenomena, karst hydrogeology, ecology and microbiology, and highlights in particular the vulnerability of the karst to various human activities. The main focus of attention is on karst water sources. In assessing their characteristics we used available knowledge of karst water on both sides of the border and supplemented it with new research on the transboundary area in question, which was based on field measurements and sampling, and chemical, microbiological and biological analysis of water. The collected findings form the basis for planning more effective monitoring of the quality of karst water sources, their protection and consequently the improvement of their quality.
The book is the result of joint work and many years of mutual cooperation between researchers from Slovenia and Croatia. It was made as part of the transboundary project ŽIVO! Življenje – voda! (Life ...– Water!) (IPA CBC SI-HR 2007-2013), which involved the participation of authors from project partner institutions as well as invited authors who are familiar with the characteristics of the karst area of Northern Istria and the conditions there relating to drinking water supply. The monograph presents the natural features of Northern Istria, the karst and karst phenomena, karst hydrogeology, ecology and microbiology, and highlights in particular the vulnerability of the karst to various human activities. The main focus of attention is on karst water sources. In assessing their characteristics we used available knowledge of karst water on both sides of the border and supplemented it with new research on the transboundary area in question, which was based on field measurements and sampling, and chemical, microbiological and biological analysis of water. The collected findings form the basis for planning more effective monitoring of the quality of karst water sources, their protection and consequently the improvement of their quality.First editon was published in 2015, this corrected second edition is available also in paperback (ISBN 978-961-05-0001-8).
U radu se daje pregled metodologije i rezultata dosadašnjih istraživanja promjena režima protoka rijeka u Njemačkoj, Švicarskoj, Austriji i Sloveniji. Nakon toga prikazani su rezultati analize ...promjene protočnih režima na rijekama u hrvatskom dijelu poriječja Dunava uspoređujući standardno tridesetogodišnje razdoblje (1961. – 1990.) i posljednje tridesetogodišnje razdoblje (1980. – 2009.). Za analizu su upotrijebljeni modulni (Pardeovi)
koeficijenti dobiveni na temelju srednjih godišnjih odnosno mjesečnih vrijednosti protoka na dvanaest hidroloških postaja na jedanaest tekućica. Uz modulne koeficijente upotrijebljena je statistička metoda Kendall-Theil za analizu trenda na godišnjoj razini te po tromjesečjima (godišnjim dobima). Rezultati upućuju na promjene protočnih režima na svim tekućicama u hrvatskom dijelu poriječja Dunava. One se očituju kroz redistribuciju protoka unutar godine, povećanje jesenskih i zimskih te smanjenje ljetnih protoka te pomake u mjesecu javljanja maksimuma i minimuma. U većini slučajeva promjene se mogu objasniti promjenama padalinskog režima, ali je za detaljnije rezultate potrebno provesti istraživanja na razini poriječja.
Dolina Triglavskih jezer Brancelj, Anton; Dakskobler, Igor; Erhartič, Bojan ...
Geografija Slovenije,
2015
eBook
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In 1924, the Triglav Lakes Valley was designated a protected area, which is today part of the central area of extensive Triglav National Park. The lakes give a special character to the valley, which ...also stands out for its other natural features. In terms of nonliving nature, this volume presents some of the valley’s geological, geomorphological, and hydrological characteristics, and, in terms of living nature, it presents its vegetation, focusing on botanical characteristics and forest. The volume also discusses the human presence and its impact on the appearance of the landscape.
The study was carried out in a raised bog located in the Kamanos state reserve in northwestern Lithuania (56°16'N, 22°39'W). The area of the raised bog is 1722 ha. To assess the effect of ...meteorological factors and damming of drainage ditches on the water regime of the Kamanos mire, we have analysed the water table depth fluctuations over the last 22 years in the northern part of the mire, which was drained out in 1907, and the drainage ditch was dammed in 1999. The control plots were established in the central part of the raised bog without draining activities, where Eriophorum va-ginatum-Sphagnum spp. communities prevail in the ground vegetation and small Scots pine trees may also be found.
The results showed that, in both natural and damaged-by-drainage sites of the raised bog, the air moisture deficiency and the amount of precipitation had a significant effect on the fluctuation of the water table depth during the growth period (R = 0.416 - 0.761 p < 0.05). In comparison with the control plots, in 7 years after establishing dams in a 0.9-1.2 m deep ditch, the groundwater table increased by 9.8 to 12.2 cm in the area up to 980 m apart from the ditch. After damming the ditches in the extensively and intensively drained parts of the raised bog, the levelling out of the water table to a similar depth as in the control plots, occurred within 4 years and is forecasted to occur within 12 years, respectively. The water table of the drained sites of the raised bog was more sensitive to increasing annual temperatures than the water table in the undrained sites of the raised bog.
Sustav Zračak nade 2 – Kaverna u tunelu Učka najveći je i najdublji speleološki objekt u Primorsko-goranskoj županiji. Speleološka istraživanja započinju već 1977. godine prilikom bušenja tunela Učka ...kada je probijena Kaverna u tunelu Učka, a koja je zatim istražena do duljine 1490 m i 135 m visinske razlike. Snažna zračna strujanja ukazala su na postojanje gornjeg ulaza, odnosno na puno veće prostiranje nego li dotad poznato. Tek 30-ak godina kasnije javlja se vizija o mogućnosti pronalaska prirodnog puta do Kaverne s površine koja je tako poticala naredna višegodišnja speleološka istraživanja na Učki. 2011. pokraj prijevoja Poklon pronađena je jama Zračak nade 2 koja je do kraja 2017. godine istražena do gotovo 2 km ukupne duljine i do svega 100-njak metara udaljenosti do Kaverne. Konačno u veljači 2018. godine, Zračak nade 2 povezan je s Kavernom u tunelu Učka u jedinstveni sustav, čime je ostvaren priželjkivani cilj. Ipak, to nije bio završetak jer je nastavkom istraživanja i narednih godina, a do trenutka pisanja ovog članka, Sustav dostigao duljinu od 6620 m i visinsku razliku od 430 m s brojnim mjestima nastavka. Također, po prvi put je složen i objavljen kompletan speleološki nacrt Sustava. Osim iz speleološkog aspekta, Sustav je vrlo zanimljiv i iz hidrogeološkog i vodoopskrbnog aspekta obzirom da je većina podzemnih kanala formirana na kontaktu karbonata i fliša po kojem teku podzemni tokovi. Glavni vodeni tok kaptiran je za vodoopskrbu već 1983. godine te do danas čini strateško važan izvor pitke vode za Opatiju i Liburnijsku rivijeru. Tako je osim povijesti i tijeka trenutnih speleoloških istraživanja, u radu ukratko opisana i geomorfologija i hidrologija Sustava, koja je bila pobliže istražena zahvaljujući suradnji speleologa i institucija.
Obnovom vodotoka teži se postizanju prirodnijeg stanja korita dok se istovremeno ostvaruju preduvjeti za povrat prirodnih procesa i funkcija vodotoka. Raspoložive mjere obnove vodotoka prilično ...variraju u opsegu i kompleksnosti i u članku su prikazane neke od najčešćih vrsta zahvata. Učinak različitih mjera i zahvata revitalizacije vodotoka analizira se s hidrauličkog, hidrološkog, morfološkog, ekološkog i socio-ekonomskog gledišta. Također je prikazan i načelni tijek provedbe projekata s mogućim dionicima. Obnova vodotoka Republici Hrvatskoj je nova aktivnost vodnoga gospodarstva, iako se u ostalim europskim zemljama provodi više od 30 godina.
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