ground surface Y-15.6 kNm3 Ysar-16.6 kN/m³ 4 m water table Clay 5 m Ysar=17.8 kN/m

Do not attempt if not sure. It is required to deepen a lake by 1.50 m over an area of 50m * 150m There is water to a depth of 1.0 m in the lake. The unit weight of the soil at the bottom of the lake is 19.5kN / (m ^ 3) and the specific gravity of the soil grains is 2.70. What is the in situ water content of the soil at the bottom of the lake? It is proposed to lower the water table to the ground level and carry out the required excavation. The soil removed will be air dried and placed as compacted fill in a nearby earthwork, at dry unit weight of 18kN / (m ^ 3) What would be the height of the compacted fill, when the soil is placed over an area of 100m * 100m ?

At a well the ground elevation is 1510.0 (m asl), the depth to the water is 5.0 (m) and the lithology is 0-10 m sand; 10-12 m grey clay. What is the hydraulic head in m asl and the hydraulic gradient?

How to solve this can you.please help.