Survey And Investigation
​
•Topographical Survey, Travers Survey,Tbm Fly leveling
• Feasibility Study of Water Pipeline Corridor and Optimization
of Alignment, Conducting Final Location Survey,
Detailed Engineering Survey
• Hydraulic, Hydrological Investigations and Condition Survey
• Project Management and Construction Supervision
 
Design Engineering and Detailed Project Report (DPR)
​
• Alignment Plan, Sections
•  Design of Structures, Grade Separators, Drainage
•  Bill of Quantities, Project Costs, Economic and Financial Analysis
• Pipeline Hydraulics, Intake, Water Treatment, Storage and Distribution
• Sewage Collection, Wastewater Treatment and Recycling
• Storm Water Drainage and Disposal

🚰 Water Supply, Sewerage & Drainage Survey and Design 

1. ✅ Preliminary Planning & Reconnaissance

• Study of project location, topography, population, and development plans.

• Collection of existing utility data (if any).

• Reconnaissance survey to understand site conditions and constraints.

2. 📋 Data Collection

A. Topographical Survey

• GPS, Total Station, or Drone-based survey.

• Marking of contours, roads, existing utilities, water bodies, structures.

B. Population Forecasting

• Based on census data, town planning schemes, or client inputs.

• Consider design period (typically 30 years).

C. Soil Investigation

• Boreholes for understanding sub-soil conditions (for trenching & manholes).

D. Hydrological Data

• Rainfall intensity data for drainage design (e.g., IDF curves).

• Groundwater table, infiltration capacity, runoff coefficient.

E. Existing Infrastructure Assessment

• Map and assess existing water supply, sewerage, and stormwater systems.

3. 🛠️ Design Methodology

A. Water Supply System Design

a) Demand Estimation

• Per capita water demand (as per CPHEEO or local standards).

• Include domestic, commercial, institutional, fire-fighting, and losses.

b) Source Identification

• Surface water, groundwater, or existing supply network.

• Quality testing and sustainability of source.

c) System Components Design

• Intake Structures (if surface source).

• Pumping Stations – Based on elevation and flow.

• Water Treatment Plant – Design capacity based on peak demand.

• Storage Reservoirs (OHT/GSR) – Based on balancing and fire demand.

• Distribution Network – Loop system preferred; pipe sizing using Hazen-Williams or Darcy-Weisbach method.

d) Design Software Tools (if used)

• EPANET, WaterGEMS, AutoCAD Civil 3D.

B. Sewerage System Design

a) Sewage Generation Estimation

• 80–90% of water supply assumed as sewage.

• Add infiltration/inflow allowances.

b) Design Flow

• Consider peak factor (typically 2.5–3.0).

• Minimum self-cleaning velocity: ~0.6 m/s.

• Maximum velocity to prevent scouring: ~3 m/s.

c) Network Design

• Gravity-based collection system preferred.

• Manholes at junctions, bends, and every 30–50 m.

d) Sewage Pumping Station (if required)

• For low-lying areas where gravity flow not feasible.

e) Sewage Treatment Plant (STP)

• Selection of treatment technology: ASP, SBR, MBBR, etc.

• Effluent standards as per CPCB or local pollution control norms.

f) Design Software Tools

• SewerGEMS, Bentley SewerCAD.

C. Storm Water Drainage Design

a) Runoff Estimation

• Rational Method: Q = CiA

  • C = runoff coefficient

  • i = rainfall intensity (mm/hr)

  • A = area (ha)

b) Drain Sizing

• Based on rainfall data (5–10 year return period).

• Non-silting, non-scouring velocities.

c) Network Layout

• Gravity flow, avoid cross-connections with sewers.

• Roadside drains, main outfalls, culverts.

d) Outfall Arrangement

• Discharge into natural drains, rivers, or designated channels.

e) Provision for Rainwater Harvesting

• Where applicable, design recharge pits or soak wells.

4. 🗂️ Drawings & Documentation

• Plan & Profile Drawings for water, sewer, and storm drains.

• Manhole/Chamber Details

• Network Layout Maps (GIS-based if applicable)

• Design Calculations

• Bill of Quantities (BOQ) & Cost Estimates

• Technical Reports – Feasibility, DPR, etc.

5. 🧪 Validation & Approvals

• Cross-check designs against CPHEEO Manual, NBC, IS Codes.

• Submit to local authorities for review and approval.

6. 🧱 Implementation Support (if applicable)

• Construction supervision methodology.

• Material & quality control procedures.

• As-built drawings and commissioning plans.

📚 Key References

• CPHEEO Manual (MoUD, India)

• IS Codes: IS 1172, IS 456, IS 1742

• NBC: National Building Code of India

• Local municipal/urban planning guidelines

Let me know if you want this tailored for:

• A specific city or region

• A detailed DPR format

• AutoCAD or GIS support

• Excel templates for calculation