☰ Contents · Geography

Natural districts and Chirchiq-Ohangaron

Lessons 45–47 · 3 lessons · P. Gulomov, H. Vahobov, P. Baratov, M. Mamatqulov. Geography (Physical Geography of Central Asia; Physical Geography of Uzbekistan), Grade 7. Revised and expanded 5th edition. “O‘qituvchi” Publishing House, Tashkent, 2017
47

Climate, waters, soils, plants and animals (Chirchiq-Ohangaron)

Textbook: pp. 112–113
GoalDescribe the climate, waters, soils, plants and animals of the Chirchiq-Ohangaron district.
New words
altitude zonation · balandlik mintaqalanishiright tributary · o‘ng irmoqcultivated grey soil · madaniy bo‘z tuproqbiosphere reserve · biosfera qo‘riqxonasi
Explanation

The climate of the district is not uniform. On the plain summers are hot and dry (the July mean is about +27°C, the hottest day up to +44°C) and the January mean is –1…–2°C; in the mountains summers are cooler (about +17…+24°C in July) and winters colder. Precipitation is 250–300 mm in the south-west of the plain and increases to the north-east, reaching up to 2000 mm on the windward slopes of the Western Tien Shan; most falls in spring and winter. The largest river is the Chirchiq, formed where the Chatkal and Pskem meet; about 55 percent of its water comes from the Chatkal and 36 percent from the Pskem. Small lakes such as Shovulkul and Katta Arashon are known. On the plain grey soil has become cultivated grey soil through farming; with height come grey soils, then mountain forest and mountain meadow soils. Ephemerals such as tulips grow on the plain, walnut, hawthorn, barberry, juniper and maple at 1200–2500 m and alpine meadows above 2500 m. Bear, snow leopard, deer, boar, partridge and eagle live in the mountains. The Chatkal Biosphere Reserve and the Ugam-Chatkal National Nature Park protect nature.

Worked examples
In summer the air at Charvak is cooler than in Tashkent because temperature falls with altitude.
If snow melts fast on a slope in spring, water rises in the Chirchiq tributaries and a mudflow risk appears.
Class activity

“Mountain climb”: on a wall-style drawing draw 4 levels from bottom to top (grey soil, forest, alpine meadow, snow) and write a plant and animal on each. Go to the mountains only with adults and never eat unknown plants or mushrooms.

Practice
1
Which rivers join to form the Chirchiq?
2
In which direction does precipitation increase in the district?
3
If 55 percent of Chirchiq water comes from the Chatkal and 36 percent from the Pskem, what percent comes from other tributaries?
4
Why do soils and plants change from bottom to top in the mountains?