Cabinet of Ministers Regulations No. 510, Riga, July 24, 2007 (pr. No 42 25) natural barring "glass swamps" personal protection and terms of use are Issued in accordance with the law "on especially protected natural territories" of the second subparagraph of article 14 and article 17, second paragraph i. General questions 1. determines: 1.1. natural barring "glass swamps" (further-ban) and the use of protection;
1.2. functional zoning restriction;
1.3. name of barring natural-special informative signs and use of samples and creation;
1.4. restriction in the natural monument-protected tree-protection and use. 2. do not force the territory Barring specially protected natural territory protection and general terms of use. 3. Barring the area is 6598 hectares. Barring specific functional area of the diagram in annex 1 of these provisions, but the composition of the functional zones-this provision in annex 2. 4. Barring the natural border with special informative signs. Informative sample of the mark and the procedures for using these provisions set out in annex 3. 5. Barring the following functional areas: 5.1 adjustable mode area;
5.2. the behavior of nature area;
5.3. the natural park area;
5.4. in the neutral zone. II. General aprobežojum throughout the territory barring 6. Landowners, the legal possessor and users banned from your property or restrict the movement of visitors use on roads, watercourses, water bodies, as well as the paths that are specified in annex 1 of these rules and behavior for viewing. 7. Information on the barring existing specially protected habitats and species specially protected biotopes can be spread only through conservation management written permission. 8. throughout the barring of banned: 8.1 installation of new landfills and pollute the environment with waste and piegruž and store the waste it unexpected places;
8.2. without the national environmental service for the regional environmental governance (hereinafter regional environmental administration) written permission: 8.2.1. perform actions that cause ground water, and surface water level changes;
8.2.2. deploy in any natural form of advertising outside built-up areas;
8.3. the Beaver Dams and damage to their home. These steps must be performed with the regional environmental governance written authorization if: 8.3.1. Beaver Dams affect the groundwater level or surface water runoff or level restriction to adjacent territories;
8.3.2. Beaver activity poses especially protected species or habitat conservation;
8.3.3. Beaver activity due to damaged or flooded roads;
8.3.4. Beaver activities inundated earlier Beavers intact areas. 9. permissible barring Construction under the municipal territory planning, subject to these rules and regulations regulating the construction procedures and restrictions. III. the Adjustable mode zone mode zone Adjustable 10 is designed to ensure protection of the boreal forest and bog complexes with high biological value. 11. adjustable mode areas is prohibited in the economic and other activity, except the following: 11.1. attendance area;
11.2. forest fire prevention measures, human rescue and search;
11.3. maintenance;
11.4. hunting under hunting regulatory laws;
11.5. fishing in accordance with the fishing regulatory laws;
11.6. wild mushrooms, plants and their products to collection and acquisition for personal use, without the use of a special collection of accessories;
7.3. environmental monitoring, forest monitoring and forest inventory;
11.8. the regional environmental governance written permission: 11.8.1. scientific research activity;
11.8.2. road renovation;
11.8.3. underbrush cutting in accordance with the provisions of annex 1, to maintain medņ rut;
11.8.4. kvartālstig maintenance. IV. Natural restricted area 12. barring area of nature is designed to preserve the characteristic Ziemeļkurzem swamp and Lake complex and there common especially protected species, as well as protect particular habitats. 13. Natural barring area prohibited to: 13.1. use waterfowl hunting projectiles containing lead;
13.2. to hunt birds Vaseniek bog;
13.3. mow the Meadow, away from edges to center field;
13.4. to carry out land transformation. The exceptions are land transformation meadow restoration and tourist and recreational infrastructure construction in accordance with the provisions of annex 1, as well as land transformation 13.30.1. these terms at the bottom of this work;
13.5. to construct new roads;
13.6. installation of the bog Cranberry plantation;
8.5. Blot dry marshes and wet forest habitats;
13.8. burn dry grasses and reeds;
13.9. to cut trees in the main lock and Reconstructive slapped;
13.10. to cut the trees thinning hair (except the disease infected by pest infested or otherwise damaged trees in accordance with the provisions of paragraph 13.30.9. and regulations) if valdaudz's age exceeds: 13.10.1. pine and oak groves-60 years;
13.10.2. spruce, birch, melnalkšņ, an ash and lime groves-50 years. The exception is on the second floor of spruce cutting medņ maintenance of rut and oak from the release of the cover in accordance with the provisions of annex 1;
13.10.3. Aspen groves-30 years;
13.11. from 1 April to 1 October to carry out forestry activities except forest fire, forest restoration, with hand tools and dangerous trees (trees that threaten the lives and health of people nearby buildings or infrastructure) digging and harvesting;
13.12. tapping into the growing trees stands, save a tree pruning view point of installation and maintenance, as well as the maintenance of power lines on road safety on the roads;
13.13. stands dead trees to cut and remove fallen trees, krital, or parts thereof, which is the diameter of the larger space is larger than 25 inches, except hazardous trees and fresh wind fallen ash and spruce, if it is more than five cubic metres per hectare and it stands can promote the continuation of massive savairošano pests;
13.14. stands with a damp minerālaugsn and stands with damp peaty soils remove fallen trees (regardless of its diameter), except hazardous trees and fresh wind fallen ash and spruce, if it is more than five cubic metres per hectare and it stands can promote the continuation of massive savairošano pests;
1.15 p.m.. move through the water bodies and watercourses with motorized vessels. The exception is State and local government bodies, the movement of officials of their duties;
13.16. to leave the roads and travel by motor vehicles, mopeds, waggon and horses through the forest and agricultural land, if it has nothing to do with the management or monitoring of the territory;
13.17. fix up camp, rest areas and build tents outside the designated places;
13.18. bonfire outside the specified or specially equipped sites, excluding fires in the incineration of residues of digging under the forest management regulatory laws, as well as fires the digging of incineration residues, cutting down trees and shrubs meadow restoration works;
13.19. to hold autosacensīb, motosacensīb, ūdensmotosport and water skiing competitions, as well as rally, treniņbraucien and test drive;
13.20. the installation of wild plants, animals and fungi, as well as product sales and buying points;
13.21. use special devices to collect wild berries and mushrooms for reading;
13.22. install wind generators;
13.23. let the dog being in the outdoors without a leash and uzpurņ, with the exception of hunting regulatory laws in certain cases and order;
13.24. getting valid minerals, except for underground water extraction in the personal needs;
13.25. damage or destruction (also ploughed or cultivating) floodplain, patio and forest meadow and lauc, except game follow-on lauc;
13.26. split the land of land units smaller than 10 hectares (including dividing joint ownership) as well as usage rights for joint ownership, if any remains in use by the co-owners less than 10 hectares;
13.27. perform actions that cause soil erosion;
13.28. installation of the fenced areas for keeping wild animals in captivity;
13.29. build and install new waterworks and drainage system. The exception is those activities with the regional environmental governance written permission if necessary habitat protection measures of Vaseniek Marsh and Lakes;
13.30. regional environmental management without the prior written permission of: 13.30.1. restoration, restore or reconstruct roads, utilities and other engineering structures. The exception is wood, puze 146.147.148.149.,,, 164, 165, 186., 187, 190, 191 and 192.. block, USMA forestry 295., 353 and 354. Chinatown and. Ūķen forestry of 361, 367, 368.., 374, 375, 376..., and 393. Chinatown, where such activities are not allowed (exception does not apply to the Eastern block 187 robežstig and 393. block north of robežstig);
13.30.2. to organize outdoor public events involving more than 50 people;
13.30.3. installation of the cognitive, recreational and tourism infrastructure projects, except those provided for in annex 1 to these rules;

13.30.4. restoring the forest planting or sowing and ieaudzē forest;
13.30.5. collecting natural materials collections;
13.30.6. scientific studies;
13.30.7. installation of the water base of the vehicles;
13.30.8. to cut the disease infected by pest infested or otherwise damaged trees in the main lock at national forest service health care opinion, slapped and sanitary felling. V. natural park zone 14. Natural park area is designed to promote the conservation of the natural values of the complex and reduce the impact of economic activity on the natural area and barring adjustable mode area. 15. Natural park area prohibited to: 15.1. mow the Meadow, away from edges to center field;
15.2. Blot dry marshes and wet forest habitats;
15.3. to burn dry grasses and reeds;
15.4. to cut trees and clear cut the curls in reconstructive;
15.5. to leave the roads and travel by motor vehicles, mopeds and harnessed through the forest and agricultural land, if it has nothing to do with the management or monitoring of the territory;
15.6. bonfire outside the specified or specially equipped sites, excluding fires in the incineration of residues of digging under the forest management regulatory laws, as well as fires the digging of incineration residues, cutting down trees and shrubs meadow restoration works;
15.7. to use special devices to gather wild berries and mushrooms for reading;
15.8. to install wind generators;
15.9. to allow the dog being in the outdoors without a leash and uzpurņ, with the exception of hunting regulatory laws in certain cases and order;
15.10. to divide the land into land units smaller than 10 hectares (including dividing joint ownership) as well as usage rights for joint ownership, if any remains in use by the co-owners less than 10 hectares;
15.11. to build and install the new waterworks and drainage system, except with the regional environmental governance written permission if necessary habitat restoration measures.
15.12. the installation of a fenced area for keeping wild animals in captivity;
15.13. the parental lock, felling the prevailing tree species of valdaudz trees (except in declining growth, disease, pest infested infected or otherwise damaged trees), where the predominant tree species aged: pine and oak 15.13.1. groves-60 years;
15.13.2. spruce, birch, melnalkšņ, an ash and lime groves-50 years;
15.13.3. Aspen groves-30 years;
15.14. regional environmental management without the prior written permission of: 15.14.1. organize outdoor public events involving more than 50 people;
15.14.2. take land transformation;
15.14.3. restoration, restore or reconstruct roads, utilities and other engineering structures;
15.14.4. installation of the cognitive, recreational and tourism infrastructure. The exception is the object of this provision in annex 1;
15.14.5 a autosacensīb, motosacensīb., ūdensmotosport and water skiing competitions, as well as rally, treniņbraucien and test drive;
15.14.6. to cut trees in the main lock at national forest service health and sanitary felling of the opinion. The exception is medņ rut care to maintain medņ rut. Vi. The neutral zone 16. Neutral Zone has been created to ensure the development of populated areas. VII. Nature monuments Barring existing 17 natural monuments-protected trees-is local and his alien species (trees whose girth 1.3 metres from tree roots neck or height is not less than the provisions set out in annex 4). 18.10 metre radius around the protected trees (measured from a protected tree crown projection outside edge) banned: 18.1. take any action that killed or would damage or destroy natural monument or impair its natural aesthetic importance;
18.2. to take any actions which may affect the conservation of tree growth and natural development;
18.3. to obtain valid minerals, except for underground water extraction in the personal needs;
18.4. the installation of the rest areas and camps, bringing tents and bonfire outside the specified or specially equipped places;
18.5. to protect apkrau trees;
18.6. to change environmental conditions-water and tree feeding mode;
11.6. take the Earth transformation;
12.8. to destroy or substantially changed, except for natural bushes repetitions and tree felling in accordance with these rules and regulations;
11.7. the regional environmental governance without the written permission of: installation, 18.9.1. recreation and tourism infrastructure projects;
18.9.2. take natural monument management measures to the protection and conservation of the future;
18.9.3. build and operate an underground premises not related to extraction of mineral resources;
18.9.4. to cut trees. 19. A protected tree felling (vintage) permissible only if it become dangerous (risk to human life and health, nearby buildings or infrastructure) and the regional environmental governance written authorisation. Prime Minister a. Halloween Environment Minister r. vējonis annex 1 Cabinet on 24 July 2007 the Regulation No 510 of natural barring "swamps" of functional Glass zone scheme, Minister for the environment r. vējonis annex 2 Cabinet 24 July 2007 No. 510 of rules barring "a glass of Natural swamps" functional area composition i. Adjustable mode zone mode zone 1 Adjustable within the forest blocks and nogabal list: no quarter 1.1. Nogabal PO box 336 337 All 1.2 All 1.3 All 1.4 All 346 347 348 349 1.5. All 1.6.
1.7. All 350 All 1.8 1.9 1.10 352 351 All All All 1.11.353 354 1., 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31 1.12.355 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 8, 361 3 1.13. 13 1.14.362 1, 4, 5, 6, 7, 8, 9, 16, 27 1.15.363 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 31, 32 1.16 364 1, 3, 4, 5, 6, 8, 9, 32 1.17.365 1, 2, 3, 4, 6, 9, 35 1.18.366 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 28, 51, 1.19 52.367 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 32 1.20.368 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 31 1.21.390 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 (II). Natural park zone 2 natural park area of forest land in blocks , nogabal and property cadastre number list: no PO box Nogabal neighborhood property cadastre number 2.1.112 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 23, 24, 25, 26, 27, 28, 29, 30, 31, 36, 42 2.2.135 All 2.3.136 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 16, 137 1 2 2.4 2.5.139 11 2.6.140 2, 25, 27, 3, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 19, 20, 21 2.7 142 1, 2, 3, 4, 5, 2, 3 143 1 2.8 2.9.144 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15 2.10.145 1, 2, 3, 5, 6 2.11.148 27 2.12.149 1, 2, 3, 4 2.13 2.14. All 157 158 10. , 11, 12, 13, 14, 4, 2.15 5 159 3, 8, 9, 14 161 All 2.17 2.16.162 1, 2, 3, 4, 5, 6, 7, 8.163 1, 2, 3, 2.18, 9, 10, 12, 29 2.19.188 1, 2, 3, 4, 10, 12, 10, 211 9 2.20 11, 15, 16, 15, 257 14 16 2.21, 2.22.258 12 26 16 2.23 2.24 270 1 269 1 , 6, 7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 54, 56 2.25.361 53, 61, 362 22 23 2.27 2.26 363 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32.2.29 2.28 364 23 365 13, 14, 15, 16 , 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 29, 30, 33, 35 2.30.366 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 28 2.31.367 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 32, 368 13 14 2.32, 19, 20, 25, 26 2.33 2.34 370 10, 11, 12.371 3 , 4, 9, 10, 11, 12, 13, 14, 15, 16, 5, 374 4 2.35 6, 9, 10, 12, 13, 14, 16, 18, 19, 2.36.375 5 6, 12, 13, 15, 21, 22 2.37 376 20, 25, 26 386 3 2.38, 4, 6, 7, 8, 11, 12, 13, 14, 16, 17, 18, 2, 3, 2.39.390 1, 5, 6, 7, 29, 30, 40.391 1 , 2, 6, 7, 9, 10 392 9 2.41, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 36, 40, 41, 393 11 2.42 17, 22, 23, 25 2.43.396 2, 15, 16, 17 2.44 2.45 2.46 409.410 All All.

88920070001 2.47.

88920070003-part of 2.48.

88920070009 2.49.

88920070015 2.50.

98600060019 2.51.

98600060020 2.52.

98600060021 2.53.

98600060027 2.54.

98600060028 v.2.55.

98600060046 2.56.

98600060058 2.57.

98600060059 2.58.

98600060076 2.59.

98600100035 2.60.

98600110006 2.61.

2.62 98600110019.

98600110020 2.63.

98600110021 2.64.

98600070011 2.65.

98600070031 2.66.

98600070141 2.67.

98600070142 2.68.

98600070144 2.69.

part 98740010003-2.70.

98740010051 2.71.

98740010078-part 2.72.

98740010084 2.73.

98600110004 2.74.

98600110010-part 2.

98600110013 2.76.

98600110016 2.77.

98600110017.78.

98740010043 2.79.

98740010044 2.80.

98740010066 2.81.

98740010069 (iii). The neutral zone 3. Neutral Zone the property cadastre number list: no PO box property cadastre number 3.1.88920070003-part 3.2 3.3 3.4 98600110010 98600110007 98600110008-part 98600110023 98600110024 3.6 3.5 3.7 3.8 3.9 98600110027 98600110025 98600110026 3.10 3.11 3.12.98600110029 98600110028.98600110030 98600110033.98600110035 3.13 3.14 3.15 3.16 3.17 98600110038 98600110036 98600110037 IV. Natural restricted area zone 4 natural barring "glass swamps" area that does not include the adjustable mode zone natural park zone and the neutral zone, barring a natural area. Note the. Joint stock company "Latvian State forests and private forest blocks and numbering corresponds to the nogabal State Forest registry data on 01.01.2006.

Minister for the environment r. vējonis annex 3 Cabinet on 24 July 2007, the provisions of the Special information no 510 sign natural and use to denote the barring arrangements 1. Special informational sign in the name of natural behavior (-mark) is the green square area of white frame with a stylized wall pictogram.
2. Sign color (color of the standard specified in Pantone, CMYK and ORACAL systems) are the following: 2.1 square area (pictograms wall background)-light green in color (Pantone M0 Y100 K0, 362C or C70 or ORACAL ECONOMY 064 (yellow green)); 2.2. the pictogram wall-white; 2.3. the outline of the wall and the wall of the pictogram of the dzīslojum-dark green (Pantone or C100 M0 Y78 K42, 3425C or ECONOMY (dark green) ORACAL 060); 2.4. sign a frame-white. 3. the procedures for using the mark: 3.1. installing the sign, select one of the following dimensions: 300 x 300 mm 3.1.1 3.1.2 3.1.3 150 x 150 mm.; 75 x 75 mm.; 3.2 marks appear in the editions size, keeping the square aspect ratio, choose according to the scale used, but not less than 5 x 5 mm; 3.3. other cases not mentioned in this annex 3.1 and 3.2 above, you can use the different sizes of signs saving the square proportions; 3.4. the sign does not install on the roads (including the tracks). 4. Mark (preparation) and deployment provides the management of nature protection, in cooperation with the relevant authorities.
Minister for the environment r. vējonis annex 4 Cabinet 24 July 2007 regulations no 506-trees-Protected local and his alien species (by the circumference or altitude) no Species of p.k. circumference 1.3 meters in height (in metres) height (in metres) of 1. Vietējāssug. Aspen (Populus l. tremul) Baltalksn (3.5-35 2. Alnus (l.) in incan Moench) 25 3.1.6 outdoor Birch (the pendulum of Betul Roth) 3.0 33 4. Swamp Birch (Betul is pubescens Ehrh.) 3.0 32 5. Pūpolvītol (Salix l. capre) 1.9 22 6. Spruce Picea abies ((L.) Karst.)
3.0 37 7. Hybrid Alder (Alnus x pubescens Tausch) 32 8.1.5 normal Elm (Ulmus glabr of Hud.) 28 9. Normal 4.0 Eve (Pad-Avium Mill.) 22 10.1.7 normal Maple (Acer platanoid-L.) 27 11. Conventional 3.5 Linden (Tilia cordata Mill.) 33 12. Ordinary Shepherd 4.0 (Ulmus laevis Pall.) 4.0 30 13. Melnalksn (Alnus glutinosa (l.) Gaertn.)
3.0 30 14. normal os (Fraxinus excelsior l.) 4.0 34 15. Common oak (Quercus robur l.) 5.0 32 16. Common beech (Carpinus betulus l.) 1.9 20 17. normal Rowan (Sorbus l. aucupari) 1.7 21 18. Ordinary pine (Pinus sylvestris l.) 38 19.3.0 Šķetr (Salix pentandra l.) 22 20.1.6 Sweden Juniper (Juniperus communis l. var. suecic-AIT.) 0.8 11 II. Alien Species of Conifers 21 21.1. Balsam spruce (Abies balsame (L.) 1.5 mill.) 24 21.2. European spruce (Abies alba Mill.) 32 European ciedrupried 21.3.2.7 (Pinus l. produced) 1.6 22 21.4. European Larch (Larix Mill. decidu) 39 Canadian tsug 3.2 21.5. (hemlokegl) (Tsug canadensis (l.) Carr.)
15. Russia 8.5 1.3 larch (Larix ledebouri (Rupr.) CIN.)
34. Black 21.7 3.0 pine (Pinus nigra Arnold) 21.8. Mount Menzies of 1.9 23 Douglas (of Pseudotsuga menziesi (Mirb.) Franco) 2.4-13.6. Western tūj (Thuja occidentalis l.) 1.4 21.10 16. Siberian spruce (Abies sibiric the Ledeb.) 30 21.11.1.8 Siberian ciedrupried (Pinus sibiric Du Tour) 1.9 22 21.12. Veimutpried (Pinus strobus l.) 2.7 36 21.13. Monochromatic spruce (Abies concolor (Gord. & Glend) Lindl. ex Hildebr.) 1.7 32 22.22.1 Ailantlap deciduous trees in Walnut (a ailanthifoli of Juglan Carr.) 1.4 20 13.8. Outdoor birch, šķeltlap (the pendulum of Betul ' Crisp ') 25 white robīnij 1.6 22.3. (the pseudoacaci l. Robini) 1.9 20 22.4. White willow (Salix alba l.)
20. Britain 22.5 4.5 Elm (Ulmus Montana Lindquis glabr can.) 22.6 30. Douglas 3.2 krustābel (Lindl., Crataegus to douglasi) 0.8 10 14.1. Yellow Birch (Betul is a British aleghaniens.) 15 Hibrīdpīlādz 1.2 22.8. (Sorbus hybrida (l.) 1.0 l.) 22.9. Dutch lang 10 (Tilia x Europaea l.) 2.8 26 22.10. Mountain Maple (Acer pseudoplatan l.) 2.2 22.11. Crimean Linden 20 (Tilia x euchlor k. Koch) 1.9 20 12/22. Field Maple (Acer campestris l.) 22.13. Mandžūrij of Walnut 18 1.5 (Max. of Juglan mandshuric) 1.6 18 22.14. Poplar and the hybrid (Populus genus) 5.0 35 paper Birch 22.15. (Marsh of Betul papyrifer.) 20 22.16. normal 1.6 beech (Fagus sylvatica l.) 3.8-22.17. Common beech , purpurlap (Fagus sylvatica ' Purpurea ' latifolia) 3.1 22.18. The usual 30, with oak (Quercus robur ' Fastigiat ') 22.19. The normal 24 2.4, lietussargveid Elm (Ulmus ' glabr ' Camperdown) 1.9-22.20. Normal zirgkastaņ (Aescul of hippocastan of l.) 3.0 23 grey Walnut 22.21. (l. to Juglan cinerea) 2.8 20 0.00. Pennsylvania's os (Fraxinus pennsylvanic Marsh.) 23 22.23. Broad-leaved lime 2.0 (Tilia platyphyllo a Scop.) 27 krustābel 22.24. Polka dot in the 3.1 (for punctat of Crataegus Jacq.) 22.25 8. Saldķirs 1.0 (cerasus Avium (l.) Moench) 1.6 12 red oak 22.26. (Quercus Rubra l.) 1.9 22.27. Blushing the 27 willow (Salix × Rubens Schrank) 3.1 25 22.28. Steppe Elm (Ulmus minor l.) 2.2 22.29 20. Silver Maple (Acer l. of saccharin) 3.2 26 22.30. Sudrabvītol (Salix alba ' sericea ') 20. Germany krustābel 22.31 4.5 (Crataegus alemanniens in the Fight.). the Green os 22.32 0.7 10 (Fraxinus pennsylvanic may subintegerrim (Vahl) Fern.) 2.0 22.33. Sweden 23 Rowan (Sorbus intermedia (Ehrh.) Pers.)
1.9 12 Minister of environment r. vējonis