Wybrane aspekty modelowania systemu zaopatrzenia w wodę na przykładzie miasta Łapy

Celem pracy jest modelowanie wybranych parametrów sieci wodociągowej miasta Łapy oraz symulacja zamiaru podłączenia nowych ujęć dla różnych wariantów lokalizacyjnych. Jako obiekt badań wybrano sieć wodociągową miasta Łapy o liczbie mieszkańców 2300, zasilaną z trzech ujęć. Średnie dobowe zużycie wody wynosi 1383 m3/d. Większość wody zużywana jest przez mieszkalnictwo oraz tereny przemysłowo-składowe.

The aim of the work was modeling of selected parameters of the water supply system of Łapy city and simulation of intention of connecting new intakes for various location variants. Water supply system of Łapy city with 2300 inhabitants supplied from three intakes was the object of investigations. Average day usage of water is 1 383 m3/d. Majority of water is used by housing and industry and storage terrains. In the first phase of creating the model digital map of Łapy in the scale 1:500 was used and following layers were marked off: net of water supply conductors, borders of plots and buildings. On the base of created map exact values of length and diameters of sections of water supply system and ordinates of individual elements of water supply system were obtained. In order to asses water usage records of readings (years 2006 and 2007) from all water meters located on the water supply system, of total 2056 objects, were taken. In order to verify values pressure in created model of water supply system [1] data loggers of pressure and temperature Cellbox-H were located on selected underground hydrants. Measurements gathered this way were used for comparison and calibration of pressure in given points of net obtained using the model and using real values from data logger. Utilization of measurements of water usage within one year in studied municipal enterprise allows to model average day water demand on the water supply system [2]. Modelling water pressure on the individual sections of water supply system is possible thanks to suitable introduction of data about studied system to programme executing the hydraulic simulation on the base of digital map of the city. In order to obtain credible results it is indispensable to start model on the basis of values of average day water usage and verification of obtained thanks to model pressures with measurements from data logger. Than calibration of model on the basis of executed measurements should be conducted, and next simulation of work in various conditions should be made.