Pool Principles:
When building a pool, the following should be considered first. 1- Preparation of topography map 2- The physicochemical conditions of water should be described precisely. 3- Air and water temperature changes and water flow changes throughout the year should be determined. 4- Ownership of water and land and the communication route should be investigated. 5- Overall estimate of the plan and investigation of problems and bottlenecks 6- Approximate examination of fixed and current costs and economic profit of the project
Physico Chemical Characteristics of Water:
1- The temperature should be between 18-32 degrees Celsius, of which 22-28 degrees Celsius is the most suitable. 2- PH should be between 2.8-6.8. 3- Oxygen should be between 6-8 mg/liter. 4- Carbon dioxide should not be high, maximum 5 mg/liter 5- Iron and chlorine should not be more than 1 mg per liter. The salinity level is about 3 grams per thousand.
Soil Properties:
1-Be neutral or in balance with water. 2- Rich in potassium, phosphorus and nitrogen. 3- If possible, the soil should not be sulfated, because it causes the water to become acidic. 4- The soil should have enough clay. General features of the pool: 1- The large length of the pool should be east-west. 2- The slope of the pool floor from the entrance to the exit should be 2 to 3 per thousand. 3- The slope of the pool floor from the sides to the middle drain should be three per thousand. 4- The slope of the walls should be 1:4 to 1:8, the road on the embankment is about two meters. 5- There should be a distance of two meters between the drain and the base of the wall. 6- The slope of the inner surface of the wall should be 1:2, but in large pools where the effect of wind is high or in pools which are made of light soil, the slope can be reduced to 1:4 and the external slope is taken as 1:2.
measures necessary to build a pool:
1- Land mapping. 2- bush carving. 3- Marking to determine the area of the pool. 4- Measuring and marking for building embankments. 5- Collecting vegetable soil. 6- If necessary, digging the bottom of the pool. 7- Construction of walls. 8- Construction of inlet and outlet valves.
