How to use an educational sand-box model to enhance the knowledge groundwater dynamics

Abstract

UvodV svetu obstaja kar nekaj raziskav o dojemanju hidrogeolo�kih pojavov oziroma dinamike podzemne vode ter o njihovem u~enju in razlagi z u~nimi modeli. roDhe (2012) je predstavil uporabo preprostih modelov pri �tudiju hidrogeologije na Švedskem s podrobnim opisom na~ina izra~una hidravli~nega potenciala in razli~nih hidrogeolo�kih parametrov. hakoun in sodelavci (2013) so izpostavili potek magistrskega �tudija hidrogeologije v Franciji, ki zajema tri sklope: predavanja, poizkuse na u~nih modelih ter terensko delo. Izvle~ekProstovoljna anketa o razumevanju dinamike podzemne vode med 45 odraslimi ne-geologi v Sloveniji je pokazala, da petina do ~etrtina anketiranih slabo pozna omenjeno vsebino. Medtem ko so pojavi, pridobivanje in onesnaževanje podzemne vode dokaj dobro poznani, z izjemo globoko ukoreninjenega (razen na kra�kem svetu napa~nega) mi�ljenja o obstoju vodnih žil in podzemnih rek in jezer, je podro~je za�~ite vodnih virov bistveno slab�e. Izkazalo se je, da prikazano znanje temelji na izku�njah kot pa na razumevanju regionalne dinamike podzemne vode. Zato je smiselno pristopiti k sistemati~nem izobraževanju o podzemni vodi ne le za geolo�ko ampak tudi za lai~no javnost. Na pobudo VO-KA iz Ljubljane smo razvili u~ni model vodonosnika Ljubljanskega polja, ki ga bo podjetje uporabljalo za raz�irjanje znanja o podzemni in pitni vodi. Model prikazuje pretežno dvodimenzionalni tok podzemne vode v nehomogenem in anizotropnem medzrnskem vodonosniku ter vpliv razli~nih naravnih pojavov in antropogenih posegov na koli~insko in kemijsko stanje podzemne vode. Z njim je mogo~e razložiti hidrogeolo�ke pojave na razli~nih nivojih predznanja, od preproste vizualizacije do njihove �tevil~ne opredelitve. AbstractForty-five adults, which do professionally not deal with geology or groundwaters, filled a voluntary questionnaire on groundwater dynamics in Slovenia. The survey pointed out that about a fifth to a quarter of them has a weak knowledge on this topic. Groundwater occurrence, production and pollution are quite well known, excluding a widely spread opinion on subsurface water veins and underground rivers and lakes (which are true only for karstic aquifers), but groundwater protection is much less known. It has turned out that the answers often base on the experience of the interviewee rather than on an understanding of a regional groundwater dynamics. Therefore, we believe that it is worth to start a systematic education on groundwaters not only for geologists but also for general public. The VO-KA company from Ljubljana has given an incentive for development of an educational sand-box model of the Ljubljansko polje aquifer, which will be used to spread knowledge on ground-and drinking water. The model of an inhomogeneous and anisotropic intergranular aquifer has predominately a two-dimensional water flow. It enables visualisation of natural features and anthropogenic on the quantity and quality state of the stored groundwater. It can be used to explain hydrogeological phenomena on various levels of knowledge, ...

Systematic overview of geological learning objectives and textbook contents for primary schools and gymnasiums

“…Koraki v to smer so že narejeni (Rman, 2013) in lahko izboljšajo doseganje zahtevane stopnje učnih ciljev.…”