Welcome to the continuation of AGT - again from the Bohemian Forest. On the way to the source of river I could and I tasted the taste of Vltava about a mile from the source and the taste surprised me. The next day , while walking in the National Park Sumava we reached the confluence of the small river named Vltava (maybe know the name) ... respectively. Warm and Kvildského Vltava river, where now I would like to invite a little mystery flavor water are cleared.
Advance but I want to point out that if you are aiming point for fast cache , so it will not work here because of successful logging here try laboratory work - homework necessary.
Life on our planet is closely tied to water. Water on Earth moves in a continuous cycle of action of solar energy and gravity. Evaporated water condenses in the form of precipitation ( rain , snow , fog, dew ...) falls to the surface. Part of the precipitation evaporates, forms part of the subsurface and surface water.
Nearby Kvilda stems most Šumava and also the longest Czech river Vltava . Flowing water represents a large number of streams and rivers. For Kvildský are typical of areas with high water table - waterlogged spruce forests and bogs. In addition to peat lakes is an area of standing water poor.
The upper sections of rivers are lined with the last remnants of natural coastal vegetation. Water is usually clean and development of life in the affected low temperature, low nutrient shading and acidity ( pH). Water acidification are natural effects (humic substances from peat bogs, acid rock subsoil) and the result of human activity (acid rain).
Tributaries in the uppermost part of the Vltava are acidic, because the water is warm river from its source to Borovi Ladu acidic. After a tributary of the Vltava river water is slightly acidic to neutral.
Three years have measuring mineral content and pH of the water verified correlation between these physicochemical factors and mikroživotem in water. The amount of mineral waters in the Sumava is the way land management. Too high levels of dissolved nutrients ( eutrofilace ) is the cause of the disappearance of the typical species of algae that affect pH.
Warm Vltava (Black Stream) is a combination of streams coming from the foot of the Black Mountains and the guards. Symbolic spring located 1.5 km southeast from the top of Black Mountain at an altitude of 1172 m south from the source of the main European watershed between the North and the Black Sea. In the uppermost stream receives water from the Vltava small streams flowing out of bogs. The Pine Lady empties first major right tributary - Vltavský stream (Little Vltava).
For the recognition of the logo or complete an answer form correctly through the following questions and challenges:
1) Tell what causes the acidity of the water?
2) Thoroughly check the map on the information sign near the start coordinates. Which of the surrounding flow has the highest pH?
3) And now, as I mentioned in the listing, we will try to measure the acidity of water and become part of the expedition that are regularly measured pH. First, collect litmus, sometimes also indicates the pH paper. It is not the most accurate way to measure pH, but for our purposes. You can get in many online stores. With a little searching, I found the cheapest for 69, - CZK - 50. I believe that the drake works great social engineering , and so is certainly not a problem to pass this amount.
Remove the sample into a glass of warm river before the confluence, Kvildského stream and of course the Warm Vltava confluence. In each sample, insert pH paper (or follow the directions on the package, if you say otherwise - for some of the drips, etc.). Once you do, place all three papers on A4 paper, each type of flow which is what you think you have measured pH and of course the date, time and your nick. The whole take a color picture and attach to your logo - last image in the listing. Yes - you can hear well, here 's a picture really mandatory, it records the geological- mineralogical phenomenon.
Log up straight, do not wait for confirmation. If something wrong - I'll contact you.