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Chirchik basin

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The database on water resources has been designed to store initial information necessary for hydrological model calculations.

The database contains the following information objects:

Point objects

  • Gauging stations
  • River and canal escapes
  • Escapes for industrial and municipal wastewater
  • Head water intakes at canals
  • Hydroschemes
  • Hydro power plants
  • Thermal power plants
  • Reservoirs

Linear objects

  • Rivers
  • Canals
  • Collectors

Areal objects

  • Planning zones (districts)
  • Flow formation zones (sub-basins)

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The key parameters

1. Hydrological and water-management information, energy sector

  • River runoff and its salinity,
  • Discharge from canals into rivers and idle discharge,
  • Discharge into rivers and reservoirs from collectors (from irrigated land, with refer-ence to PZ and irrigation systems), household and domestic waste discharge (cities, villages), industrial wastes, salinity of waste discharges,
  • Transfer flow at PZ boundaries – main canals and collectors (points of water trans-fer),
  • Withdrawals from rivers and reservoirs,
  • Reservoir operation regimes – water level, water volume and salinity at the begin-ning and the end of month, inflow, withdrawal and releases from reservoirs,
  • Groundwater – usable groundwater resources, groundwater inflow and outflow, dis-charge, filtration losses in rivers and reservoirs, abstraction from groundwater sources per user,
  • Water distribution:
    • Uzbekistan – total, including from: Chirchik, Akhangaran, small rivers (Ugam, Ak-tash, Aksakata),
    • Kyrgyzstan (Chatkal River),
    • Kazakhstan (VDK, etc.),
    • Uzbekistan’s irrigation systems (Tashkent main canal, “Bozsu” system, “Parkent-Karasu” system, “Akhangaran-Dalverzin” system) – irrigated farming, agricultural water supply, fishery,
    • Urban and industrial centers (Tashkent, Chirchik, Yangiyul, Almalyk, Angren) – household-drinking needs, industry (Chirchik chemical plant, Almalyk industrial system, Angren coal open-pit mine),
    • Internal use (with reference to irrigation systems): groundwater, CDW.
  • HEPS parameters: gross and net storage volume of reservoirs, highest controlled water surface, maximum water surface, water head in HEPS under the highest con-trolled water surface and dead-storage level, HEPS capacity, installed power.
  • Limitations:
    • Recreation demand – minimum level of Charvak reservoir drawdown (summer, winter),
    • Limitations for Charvak reservoir regarding seismicity – filling below the set level,
    • Limitations for Charvak reservoir regarding non-admission of dust storms – draw-ing off not below the set level,
    • Environmental demand for runoff: minimum flow along Chirchik river downstream of Charvak reservoir.
  • Heat-power engineering – operation parameters and requirements of State rayon power stations.

2. Land resources and their use

  • Land fund (arable land, perennial plants, fallow land, hayfields, pastures, agricultural land, other lands),
  • Irrigated areas – total, including sources: river intake (transboundary flow, main riv-ers), sai, springs, wells, collector-drainage water (CDW),
  • Area under drainage, drainage modulus,
  • Distribution of areas per soil salinity, groundwater level and salinity, index of soil quality,
  • Cropped area, including non-irrigated, cropping patterns and crop yields,
  • Agricultural production in irrigated and dry lands (seeding dates, cultivation dates, gross harvest).

3. Ecology

  • Water quality:
    • Physical and chemical characteristics,
    • Salinity and main ions,
    • Biogenic elements,
    • Organic matter,
    • Heavy metals.
  • Parameters of ecological hydroecosystem assessment,
  • Parameters of ecological landscape (natural, agricultural) assessment,
  • Parameters of anthropogenic load on ecosystems and evaluation of load conse-quences (irrigated agriculture, livestock, fishery, industrial and municipal enterprises, etc.).

4. Socio-economic parameters

  • Operational costs and net cost:
    • Costs of crop production per variety: total; machinery; labor costs; seeds; fertil-izer; fuel; other; administration; depreciation charges,
  • Water and agricultural output prices
    • Purchasing and market prices of agricultural output,
  • Productivity:
    • Irrigation water per irrigation system,
    • Industrial water use (per plant),
    • Household and drinking water use,
  • Demographic and macro-economic indicators
    • Population trends, including urban, working population, occupied in economy and agriculture,
    • Industrial production volume,
    • Agricultural production volume,
    • Investments,
    • GDP, industrial and agricultural shares,
    • Population income,
  • Water use norms – for crops, household and drinking water supply,
  • Production volumes:
    • agriculture,
    • fishery,
    • livestock,
    • output of livestock farming,
    • allied industries,
    • power sector, including hydropower,
    • industry,
  • Recreation and tourism

5. Climate data

  • Temperature, precipitation, evaporation, relative humidity (per weather station).

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