(SEM VI) THEORY EXAMINATION 2017-18 RURAL WATER SUPPLY AND SANITATION

Rural Water Supply and Sanitation (NCE-024)

Complete Section-Wise Explanation – B.Tech Semester VI

Introduction to the Subject

Rural Water Supply and Sanitation focuses on providing safe drinking water, proper waste disposal, and hygienic living conditions in rural areas. Unlike urban systems, rural systems must be low-cost, easy to maintain, community-oriented, and suitable for scattered populations.

This subject helps engineers understand:    Sources and devices of rural water supply

Estimation of rural water demand               Rural sanitation practices

Waste disposal methods                             Health, hygiene, and disease prevention

Community participation in sanitation

The question paper is divided into two main sections: A and B, and all questions must be attempted as per instructions.

SECTION A – Short Answer Questions

(2 × 10 = 20 marks)

Section A tests basic concepts and definitions. Answers should be brief, clear, and technically correct, usually written in 2–4 lines.

Explanation of Section A Questions

Devices Available for Rural Water Supply
Rural water supply devices include dug wells, tube wells, hand pumps, infiltration wells, springs, ponds, and rainwater harvesting systems. These devices are selected based on availability of water source, cost, and local conditions.

Factors Influencing Rural Water Supply Demand
Rural water demand depends on population, climate, habits of people, availability of water sources, quality of water, livestock needs, and future growth of the village.

Issues of Rural Water Supply
Major issues include seasonal scarcity, contamination, lack of treatment facilities, poor maintenance, uneven distribution, and financial constraints.

Best Method of Refuse Disposal for Small Organized Community
For a small organized rural community, sanitary landfill or controlled composting is the most suitable method because it is economical, hygienic, and environmentally safe.

Diseases Spread by Contaminated Milk
Diseases such as tuberculosis, typhoid, brucellosis, diphtheria, and dysentery can spread through contaminated milk.

Advantages of Septic Tank
Septic tanks are simple, low-cost, require minimal maintenance, and are suitable for areas without sewerage systems.

Meaning of Rural Community
A rural community refers to a group of people living in villages with agriculture as the main occupation and limited access to urban infrastructure.

Sanitation
Sanitation refers to the safe collection, treatment, and disposal of human excreta, wastewater, and solid waste to protect public health.

Bio-Gas
Biogas is a renewable fuel produced by anaerobic digestion of organic waste such as cattle dung and agricultural waste. It is used for cooking and lighting.

Design Population
Design population is the estimated future population for which water supply and sanitation systems are designed, considering growth rate and design period.

SECTION B – Descriptive Questions

(Attempt any three questions, 10 × 3 = 30 marks)

Section B requires detailed explanations written in paragraph form. Diagrams, examples, and practical relevance improve answer quality.

Occupational Hazards in Public Buildings

Occupational hazards in public buildings include poor ventilation, inadequate lighting, overcrowding, fire hazards, unsafe staircases, and improper sanitation. These hazards can cause accidents, health problems, and discomfort. Proper building design, fire safety measures, and maintenance help reduce such risks.

Stabilization Ponds – Advantages, Disadvantages & Uses

Stabilization ponds are natural wastewater treatment systems using sunlight, algae, and bacteria.
Their advantages include low cost, simple operation, low energy requirement, and suitability for rural areas.

Disadvantages include large land requirement, odour problems, mosquito breeding, and reduced efficiency in cold climates.
They are commonly used for treating sewage in villages and small towns.

Important Points for Proposed Rural Water Supply Scheme

When planning a rural water supply scheme, factors such as source selection, quantity and quality of water, population forecast, affordability, ease of operation, community participation, and future expansion must be considered to ensure sustainability.

Rural Sanitation and Its Importance

Rural sanitation focuses on safe disposal of excreta, solid waste management, drainage, and personal hygiene.

Proper sanitation prevents diseases, improves quality of life, protects water sources, and supports rural development programs like Swachh Bharat Mission.

Low-Cost Sanitation Systems

Low-cost sanitation systems such as pit latrines, pour-flush latrines, septic tanks, and biogas toilets are suitable for rural areas. They are economical, easy to construct, and adaptable to local conditions.