Hydrological Information System(HIS) Structure
     
 
  The HIS comprises of physical infrastructure and human resources for data collection, data processing,data storage and data dissemination on hydrological, geo-hydrological and hydro- meteorological quantity and quality variables.HIS is structured as follows to provide the information on water resources / water use system.
 
  • A network of observational stations.
  • Water quality laboratories
  • Sub-divisional Data Processing Centers
  • Divisional Data Processing Centers
  • State Surface Water Data Processing Center at Nashik.
  • State Data Storage Center at Nashik
   
  Data Collection
   
  At Stations: Field data and water quality samples are collected in the surface water observation networks at the stations. The water samples are brought to the water quality laboratories. The field data is submitted to the Sub-divisional / Divisional Data Processing Center at regular intervals (monthly / quarterly).
  In Water quality laboratories: The analysis of the samples is done and the analysis results are entered in the computer and are subjected to the primary validation. At regular intervals, the laboratory passes the information to the nearest Divisional Data Processing Center.
   
  Parameters measured in Hydro-Meteorological Data Collection are as below:
     
Parameter Measurement
  1. Rainfall :   i) Daily - Collected from Standard Rain Gauge(8:30 a.m.)
  ii) Hourly - Collected from Autographic Rain Gauge
  2. Temperature :   i) Maximum
  ii) Minimum
  Both measured Daily twice : 8.30 a.m. & 17.30 p.m.
  3. Evaporation :   Daily twice : 8.30 a.m. & 17.30 p.m.
  4. Humidity :   Daily twice : 8.30 a.m. & 17.30 p.m.
  5. Wind Velocity and direction :   Daily twice : 8.30 a.m. & 17.30 p.m.
  6. Sunshine duration :   Every Hour
  7. Water Level of rivers :   Daily twice : 8.30 a.m. & 17.30 p.m. Collected from River Gauge Site
  8. Discharge of river :   Daily twice : 8.30 a.m. & 17.30 p.m. Collected from River Gauge Site
   
  Data Processing
  All the field data entry and primary validation takes place in the sub-divisional data processing center. More advanced, secondary validation is carried out in the Divisional Data Processing Center. After validation the data is transferred to the State Data Processing Center at Nashik.
  The main activity of the State Data Processing Center is hydrological datavalidation, compilation, analysis and reporting. At the end of hydrological year,the processed data is transferred to the State Data Storage Center at Nashik(MH).
  Click here to view the Hydrological Data Processing flow chart
   
  Data Storage & Dissemination
  The State Data Storage Center Nashik -
 
  • Maintains a database system for permanent storage of hydrological data
  • Administrates the storage of all field and processed hydrological data collected in the State
  • Makes the data available to authorized Hydrological Data Users.
  • Maintains a catalogue of all data stored in its own database and those stored in the databases at the other States / Central agencies
  All available data sets are being maintained in well defined computerized databases using the MS Sql server 2000 database management system.
  Click here to view the Hydrological Data Dissemination flow chart
   
  Data Analysis
 
  • Data Entry and Primary Validation:
 
  • Observed data is first entered in manuscript. (Before Hydrology Project this data was treated as final & the same was used for planning. Now the following procedure is adopted to make the data reliable & quality.).
  • Using SWDES software the data is entered in computer and primary validation is carried out.
  • Primary Validation is carried out at sub divisional level. This data is then sent to division.
 
  • Secondary Validation:
 
  • Secondary validation is carried out using HYMOS software in Division.
  • Secondary validated data is sent to State Data Processing Center, Nashik.
 
  • Hydrological Validation:
 
  • Hydrological Validation is carried out using HYMOS software at State Data Processing Center Nashik, after scrutiny of validated data received from division.
  • Interagency validation by sending validated data to central agencies like CWC, IMD is done.
  • This data is then sent to Data Storage Center, Nashik.
  Data Types
  The data types stored in database include -
 
  • Geographical and space oriented data on catchments and hydraulic infrastructure.
  • Location oriented data of observation stations and laboratories.
  • Relation oriented (derived) data on two or more variables / parameters used with respect to climatic, water quantity and quality data.
  • Processing results held in objects.