L/O/G/O INNOVATIVE TECHNOLOGIES IN THE DESIGN, CONSTRUCTION AND OPERATION OF GROUND WATER WELL FIELD SYSTEM IN BELARUS Prof. A. HurynovichE. Sycheva, Prof. A. Hurynovich, E. Sycheva, Belarusian Nation Technical University A.Yakubov, MAMT JV Minsk, Republic of Belarus 1

Republic of Belarus Republic of Belarus Republic of Belarus Republic of Belarus Government type: presidential republic President: Alexander Lukashenko Capital: Minsk (1 million 921,8 thousand) Population: 9 million 468,2 thousand Major languages: Belarusian, Russian Monetary unit: Belarusian ruble (Br)Government type: President: Capital: Population: Major languages: Monetary unit: INTRODUCTION 2

Belarus Groundwater Resources Scheme depth of lower confining bed fresh groundwater Belarus (m). thousand m3 per day 3

On water supply systems has 33,378 water wells. Water supply system Water supply system is in 5432 cities and towns is in 5432 cities and towns Сentralized systems of drinking water supply in Belarus 97%97% 97%97% of the Belarusian population drinking ground water of the Belarusian population drinking ground water 4

Water tanks Water tanks Aquifer Aquifer 5

S hlhl S hlhl L max DRAWDOWN CURVE Q1Q1 Q2Q2 STATIC WATER LEVEL AQUIFER DYNAMIC WATER LEVEL Maximum loss of pressure Minimum drawdown 6

S hlhl S hlhl L iJ S hlhl S hlhl L min DRAWDOWN CURVE Q1Q1 Q2Q2 STATIC WATER LEVEL DYNAMIC WATER LEVEL Minimum loss of pressure Maximum drawdown L OPT = ? 7

BASIC PRINCIPLES OF OPTIMAL DESIGN WATER WELL FIELD SYSTEM 1.D etermination of optimal scheme of water intake (number of wells, the distance between them, the location); 2.T echnical and economic calculations for choosing well design, size and type of screen, drilling method, the type of water-lifting equipment, etc.); 3.S ubstantiation of necessity of the design and construction of water treatment facilities; 4.A ccounting of environmental and local constraints which are imposed on the of water intake scheme under specific conditions (plantations, roads, settlements, pipeline, etc.). 8

Scheme selection of the optimal water well feld 9

The problem is reduced to the determination of : the amount of water intake points (wells) - n, q uantities of water consumption from a single point – Q i, t he distance between the of water consumption points – l ij in providing the required capacity of water intake – Q в on the borders of water intake length – L and location of headworks pumping station of the second rise with minimal integral cost P min for the following variants: f or the same reduction in water level S i =S and the distances between wells l ij =l with the quantities of water consumption not exceeding Q i Q i max ; f or the same reduction in water level S i = S and different distances between the points of water consumption l ij with the quantities of water consumption not exceeding Q i Qi max; f or the same reduction in water level S i = S without limitation of water consumption quantities at the same point with the location of the second rise pump station at the beginning (end), or in the center of the water intake. 10

in the middle of water pipelines in the center of the water intake City water supply system 11

THE GRADUAL DEVELOPMENT OF DOWNHOLE THE WATER INTAKE 12

The results of the optimization of water well field system in Minsk Water treatment treatment Water well The initial draft of requirements hydrogeologists: 41 wells Pipeline - 11 km 13

General flow block of algorithm of pump system optimization 14

QLfQLfQLfQLf QLQLQLQL LfLfLfLf Q1Q1Q1Q1 Q1Q1Q1Q1 Q2Q2Q2Q2 + 1 q 1 = Q1Q1Q1Q1 S1S1S1S1 S1S1S1S1 2q2=2q2= Q2Q2Q2Q2 S2S2S2S2 S2S2S2S2 2+1 q 2+1 = S 1+2 Q1Q1Q1Q1 Q2Q2Q2Q2 + < = QLQLQLQL Q2Q2Q2Q2. Two-column water well New construction of water wells 15

Well screen of plastic rings IMPORTANT SCREEN CRITERIA AND FUNCTIONS INCLUDE: Criteria: 21% 1. large percentage of open area 21% 2. non clogging slots 3. resistant to corrosion 4. sufficient column and collapse strengthFunctions: 1. easily developed 2. minimal incrusting tendency 3. low head loss through the screen 4. control sand pumping in all types of aquifers 16

The device well submersible pump Pipeless suspension deep 17

More often, reduced well yield over time can be related to changes in the water well itself including: Chemical Encrustationn from mineral deposits Bacteriological Plugging Sand pumping Well screen or casing corrosion Pump damag e Water well rehabilitation 18

Reagent 2Н 2 О 2Н 2 +О 2 КОН Impulse-chemical technology of water well rehabilitation Water well rehabilitation

20 Сaverne Сaverne Сaverne AQUIFER Sand Iron removal of groundwater in an aquifer in wells without a screen Сaverne

L/O/G/O Thank you for your attention! Anatoli.D. Hurynovich*, Ekaterina.A. Sycheva**, Alexander. S. Yakubov*** *Professor, ** Master Belarusian Nation Technical University ***Ph.D. candidate, MAMT JV 21 Minsk, Republic of Belarus