Декабрь 2020 22-қисм
Тошкент
TABIIY KO`LLARNI SAQLAB QOLIShDA BARQAROR RIvOJLANISh
MONITORINGI
Sh.I. Jumaniyazova
Urganch davlat universiteti
Ekologiyava HFH karedrasi katta o`qituvchisi
Amatjanova Zevarjon
Ekologiyava HFH karedrasi talabasi
Annotation. The article discusses the research of limnic ecosystems in the conditions of the
Khorezm region of uzbekistan. it was noted that in order to assess the structure and functioning
of limnichny ecosystems, it is necessary to move from private assessments to integrated studies,
including monitoring the state of both biota and environmental components. The ecological
feature of the hydrochemical regime of the studied reservoirs is the seasonal nature of the change
in the concentration of nutrients. Their dynamics is characterized by two maxima - spring and
summer.
Key words:Khorezm region, limnic ecosystems, biota, factors, hydrochemical regime.
There are not many lakes in Central asia. The largest of them are the aral sea, issyk-Kul,
Balkhash and Karakol. These lakes are tectonic in origin.
most of the lakes are located in the mountains. They are smaller lakes in the middle and
highlands, often formed by the blockage of rivers and streams. Their water is very clear, clean
and cold. The lake is surrounded by a unique climate, which creates a beautiful natural landscape,
such as issyk-Kul and sarichelak. large and small lakes have formed in the river valleys,
tributaries and deltas. arnasay and aydarkol lakes are examples of lakes formed by discharge
and groundwater accumulation.
The largest natural lake in Central asia is the aral sea. it is called the aral sea due to its
size. The aral sea was one of the largest lakes not only in Central asia but also on earth. it
was the second largest in asia and the fourth largest in the world. The lake is formed in a
tectonic sediment in the center of the Turan plain, east of the ustyurt plateau, from northeast to
southwest. it is fed by two major rivers - the amudarya and the syrdarya.
The deepest point of the sea in the western part is 69 m. however, since the 1960s, the
amount of water flowing into the aral sea has declined sharply due to the high consumption
of water from the amudarya and syrdarya rivers for irrigation in Central asia. in some years,
especially after 1983-1985, the syrdarya did not supply a single drop of water to the aral sea,
and the water of the amu darya did not exceed 7-9 cubic km. Thus, the aral sea gradually
began to dry up. in 35 years, the volume of sea water has decreased, its level has dropped to
16.5 m, the sea has receded 80-100 km from the coast, and in some places 130-150 km. The
islands merged and the sea was divided into three separate basins.
There are many villages and towns around the aral sea. The region, known as the aral sea
region, has a population of about 5 million. (look at the map and find out which countries and
regions there are.) The economic activity of this population was connected with the aral sea.
The shrinking of the sea, the salinity of the salts beneath it, the shortage of drinking water, and
the current ecological crisis in the aral sea region. every effort is being made to save the aral
sea and the aral sea region from this crisis. an international organization and fund “save the
island” was established.
in particular, as a result of the organization of natural lakes in Khorezm region, we received
this information. There are several natural lakes in Khorezm region, which are: gaug role, adjali
lake, salt lake, eshon rabat lake, Khodjababa lake, Korp lake, Tuyrek lake. llari.
These lakes are located in yangiarik district, Koshkopir district, Khiva city, Bagat district,
Khazarasp districts of Khorezm region. i studied these lakes closely. (1 photo area of lakes)
32
Do'stlaringiz bilan baham: |