RBSE Solutions Class 9 Rajasthan Adhyayan Chapter 6 Water Conservation Need of Today

Rajasthan Board RBSE Class 9 Rajasthan Adhyayan Chapter 6 Water Conservation: Need of Today

Textbook Questions Solved

Multiple Choice Questions

 

Question 1. Maximum use of water in Rajasthan is made for the following sector
(a) Agriculture
(b) Industry
(c) Domestic use
(d) None of the options
Answer: (a) Agriculture
In simple words: Most of the water in Rajasthan is used for farming. This is because agriculture is a very important part of the state's economy and many crops need water to grow.

🎯 Exam Tip: When answering questions about resource use in specific regions, always consider the primary economic activities of that region.

 

Question 2. What is the percentage of potable water of the total water on earth?
(a) 1%
(b) 0.007%
(c) 3%
(d) 7%
Answer: (b) 0.007%
In simple words: Out of all the water on Earth, only a tiny amount, less than one percent, is fresh water that people can drink. Most of the Earth's water is salty or frozen.

🎯 Exam Tip: Remember this number to highlight the critical importance of fresh water conservation globally.

 

Question 3. Which country of the world has maximum number of tube wells?
(a) China
(b) India
(c) America
(d) Australia
Answer: (b) India
In simple words: India has the highest number of tube wells globally. These tube wells help to pull water from underground for farming and other uses.

🎯 Exam Tip: Knowing which countries lead in certain resource use helps understand global patterns and challenges.

Very Short Answer Type Questions

 

Question 1. How much quantity of water is required, per individual, per day according to the Indian Standards?
Answer: According to Indian standards, each person needs 85 liters of water every day. This amount covers various daily activities like drinking, cooking, and sanitation.
In simple words: In India, it is estimated that one person needs 85 liters of water each day for their daily tasks.

🎯 Exam Tip: Quote specific numbers like 85 liters per day as per standards to show precise knowledge.

 

Question 2. What is the best way of raising the level of underground water?
Answer: The most effective method to increase underground water levels is through rainwater harvesting. This process collects rainwater and allows it to seep into the ground, replenishing the water table.
In simple words: Rainwater harvesting is the best way to fill up water underground. We collect rain and let it go into the soil.

🎯 Exam Tip: Always mention "rainwater harvesting" when asked about increasing groundwater levels, as it is the most sustainable method.

Short Answer Type Questions

 

Question 1. Write the method for accumulating rain water.
Answer: Rainwater can be gathered in many ways for future use:
1. Collecting rainwater in tanks for direct use.
2. Letting rooftop rainwater flow into the ground through pipes, hand pumps, and wells.
3. Building trenches to hold rainwater, allowing it to soak into underground reservoirs.
4. Constructing small mounds in farms to collect rainwater, which then recharges underground water (rainwater harvesting).
5. Blocking water in streams with Nala plugs or other barriers.
6. Bawadis (stepwells) and dams are also good ways to store rainwater, providing water for communities and agriculture.
In simple words: We can collect rainwater in tanks, let it soak into the ground from rooftops, make ditches or mounds in fields to catch it, or build small dams. This helps save water for later.

🎯 Exam Tip: When listing methods, use clear, numbered points for easy readability and ensure a variety of techniques are included.

 

Question 2. How can Industrial units conserve Water?
Answer:

🎯 Exam Tip: For questions without a provided answer, you can briefly mention key strategies like recycling wastewater, using efficient technologies, and repairing leaks if you know them from general knowledge, but only if explicitly allowed to add content.

Long Answer Type Questions

 

Question 1. How is water misused at the domestic level? Suggest remedies to check it.
Answer: Water is often wasted at home through various common activities:
1. Using too much water for flushing toilets.
2. Leaving the tap running at full speed while brushing teeth.
3. Cleaning floors by leaving the tap open.
4. Using bathtubs and showers, which consume more water than buckets, for bathing.
5. Washing dishes and clothes directly under a running tap.
6. Using too much water to wash vegetables and other items.

Here are some ways to stop wasting water at home:
1. Use a mug of water when brushing teeth.
2. Bathe with mugs and buckets instead of bathtubs and showers.
3. Use a small bucket of water for flushing toilets instead of opening the flush every time.
4. Clean vehicles by wiping them with a wet cloth or using water from a bucket, not a pipe.
5. Reuse kitchen and bathroom wastewater for garden.
6. Plant saplings that need less water in the garden.
7. Avoid growing lawns, as grass requires a lot of water.
8. Mop floors instead of washing them with excessive water.
9. Use a mug of water for shaving.
10. Do not use a new glass every time you drink water.
11. Do not wash hands under running water.
12. Wash vegetables and fruits in a water-filled bucket, not under a running tap.
13. Fix any water leaks quickly.
14. Collect rooftop rainwater in a tank or allow it to seep into the ground through pipes.
In simple words: At home, we waste water by using too much for flushing, brushing, washing, and bathing. We can save water by using mugs, buckets, fixing leaks, recycling water, and planting less thirsty plants in gardens.

🎯 Exam Tip: Provide clear examples of misuse and actionable solutions. Grouping points under "misuse" and "remedies" makes the answer easy to follow.

 

Question 2. How can the students contribute to the Water Conservation?
Answer: Students can play a significant role in water conservation by being informed, setting good examples, and spreading awareness. They can share the knowledge they gain in school with their community in a simple and convincing way. By demonstrating water-saving habits themselves, they can inspire others to join the water conservation campaign. Students' positive contributions can reach neighbors, friends, younger children, elders, and various communities, helping to save water resources and prevent its misuse or excessive use, and also tackle water pollution.
In simple words: Students can help save water by learning about it, showing others how to save it, and telling their family and friends why it's important. They can be role models and share simple tips.

🎯 Exam Tip: Focus on "awareness," "role modeling," and "community engagement" as key contributions for students.

 

Question 3. Explain the causes of scarcity of Water.
Answer: Water scarcity is caused by several factors:
1. Increase in Population: A rapid rise in population leads to more demand for water for household, farming, and industrial activities. More people mean more water is used, putting a strain on existing resources.
2. Unequal Distribution: Rainwater does not fall evenly across all areas. Some places get heavy rainfall, while others remain dry, leading to droughts and famines in regions with less water. This uneven distribution means some areas always face shortages.
3. Dams and Anicuts: Dams and anicuts (small check dams) are built to collect water for industries and agriculture. However, poor maintenance causes silt to build up, reducing their water-holding capacity. Sometimes, dam breaches can cause significant damage and water loss.
4. Excessive Use of Water: Water is often not used wisely in daily activities like brushing teeth, flushing toilets, cleaning, and bathing. A lot of water is wasted due to inefficient or thoughtless usage.
5. Water Pollution: Industrial waste and household pollutants are dumped into water sources, making the water unsafe for drinking and other purposes. When clean water sources become polluted and unusable, it contributes to water scarcity, as the available usable water reduces.
In simple words: Water scarcity happens because of more people needing water, rain not falling everywhere, dams not working well, wasting water, and polluting water. All these things make it harder to find clean water.

🎯 Exam Tip: Organize causes into clear points with concise explanations for each. This structure helps in scoring full marks.

Additional Questions Solved

Multiple Choice Questions

 

Question 1. Contour farming is popular in
(a) Plains
(b) Hilly areas
(c) Sandy land
(d) None of the options
Answer: (b) Hilly areas
In simple words: Contour farming is a way to farm on slopes, following the curves of the land. This method is common in hilly areas because it helps stop soil and water from washing away downhill.

🎯 Exam Tip: Relate farming techniques to the terrain they are designed for; contour farming is specifically for sloped or hilly land to prevent erosion.

 

Question 2. The Planet known as the Blue Planet is
(a) Saturn
(b) Pluto
(c) Earth
(d) Jupiter
Answer: (c) Earth
In simple words: Earth is called the Blue Planet because it has a lot of water on its surface. When you look at it from space, it mostly looks blue.

🎯 Exam Tip: Basic facts about Earth, especially its distinguishing features like its color due to water, are important.

 

Question 3. has 16% population of the world but availability of water is only 4%
(a) Rajasthan State
(b) India
(c) Australia
(d) None of the options
Answer: (b) India
In simple words: India has 16% of the world's people, but only 4% of the world's available water. This big difference makes water conservation very important in India.

🎯 Exam Tip: Remember statistics like population vs. water availability to emphasize the imbalance and need for conservation.

 

Question 5. It is one of the basic necessities for the survival of life on earth
(a) Glaciers
(b) Ice
(c) Water
(d) Clothing.
Answer: (c) Water
In simple words: Water is essential for all living things to survive on Earth. Without it, plants, animals, and humans cannot live.

🎯 Exam Tip: Recognize fundamental needs for life; water is critical for all biological processes.

 

Question 6. River banks can be protected by making
(a) Dams
(b) Anicuts
(c) Parapets
(d) Vegetation Cover
Answer: (d) Vegetation Cover
In simple words: Planting trees and other plants along river banks helps protect them. The roots of the plants hold the soil together, stopping it from washing away.

🎯 Exam Tip: Think about natural solutions; vegetation is highly effective for preventing soil erosion along river banks.

 

Question 7. Main cause of scarce water resources is
(a) Urbanisation
(b) Industrialisation
(c) Increasing Population
(d) All of the options
Answer: (d) All of the options
In simple words: The main reasons for less water are cities growing, more factories, and more people. All these things use up more water and make it scarce.

🎯 Exam Tip: When given multiple related causes, "All of the options" is often the correct choice for complex environmental problems.

 

Question 8. What is the number of Dark Zones in Rajasthan?
(a) 236
(b) 140
(c) 27
(d) 28
Answer:

🎯 Exam Tip: For specific data like numbers of zones, it's crucial to have the exact figure memorized. If not explicitly provided, indicate as such.

 

Question 10. How much percentage of the total water evaporates?
(a) 2.5%
(b) 5.2%
(c) 4.5%
(d) 5.3%
Answer: (a) 2.5%
In simple words: About 2.5% of all the water on Earth turns into vapor and goes into the air, a process called evaporation. This is a part of the natural water cycle.

🎯 Exam Tip: Be precise with percentage values when discussing water cycle components like evaporation.

 

Question 11. Rain water harvesting is one of the schemes of
(a) Industrialisation
(b) Removal of water pollutants
(c) Water Conservation
(d) All of the options
Answer: (c) Water Conservation
In simple words: Rainwater harvesting is a way to save and manage water resources. It helps to collect and store rainwater, which is a key part of water conservation.

🎯 Exam Tip: Clearly link specific practices like rainwater harvesting to their broader environmental goals, such as water conservation.

Very Short Answer Type Questions

 

Question 1. What is Water Conservation?
Answer: Water conservation means using water wisely and carefully. It involves managing water resources in a way that meets current needs without compromising the needs of future generations.
In simple words: Water conservation means using water smartly and not wasting it.

🎯 Exam Tip: Define key terms clearly and concisely. Emphasize "judicious and proper use" as central to water conservation.

 

Question 2. Give two remedial measures for water conservation.
Answer:

🎯 Exam Tip: If an answer is not provided, you can recall general measures like rainwater harvesting and reducing wastage.

 

Question 3. How much water is required per individual according to the UNO standards?
Answer: According to United Nations Organization (UNO) standards, each person needs a minimum of 50 liters of water per day. This amount is considered essential for basic personal and domestic hygiene.
In simple words: The UNO says that every person should have at least 50 liters of water each day.

🎯 Exam Tip: Distinguish between Indian standards and international standards (like UNO) when quoting daily water requirements.

 

Question 4. Mention any two causes for scarcity of water.
Answer: Two main reasons for water scarcity are:
1. Wastage of rainwater.
2. Increasing population.
These factors lead to a higher demand for water and less availability, causing shortages.
In simple words: Two reasons why there isn't enough water are that we waste rainwater and there are too many people using it.

🎯 Exam Tip: Focus on easily identifiable and impactful causes, such as waste and population growth, for a direct answer.

 

Question 5. Which system of irrigation can be used in agriculture to save water?
Answer: Sprinkler and Drip irrigation systems can be used in agriculture to save water. These methods deliver water directly to plant roots, reducing waste and evaporation.
In simple words: Sprinkler and drip irrigation systems help save water in farming.

🎯 Exam Tip: Name specific, modern irrigation techniques known for their water efficiency.

 

Question 6. For which sector is the maximum of water used?
Answer: The maximum amount of water, about 60%-70%, is used by the agriculture sector. This is because farming, especially traditional methods, requires large quantities of water for irrigation.
In simple words: Most water is used in farming, about 60-70% of it.

🎯 Exam Tip: Prioritize the agricultural sector as the largest consumer of water resources in most regions.

Short Answer Type Questions

 

Question 1. What are the adverse effects of scarcity of water?
Answer: The negative impacts of water scarcity are severe and affect many aspects of human life. Irrigation, agriculture, food production, industries, construction, tourism, and overall culture are all negatively impacted when water is scarce. Life, whether living organisms (biotic) or non-living components (abiotic), becomes impossible without water. Ultimately, survival on Earth is not possible without sufficient water. Water is the foundation of all ecosystems, and its absence causes widespread collapse.
In simple words: When there is not enough water, it harms farming, food, factories, and even how people live. No living thing can survive without water, so life on Earth becomes impossible.

🎯 Exam Tip: Provide a broad overview of impacts, covering multiple sectors like economy, environment, and human well-being.

Long Answer Type Questions

 

Question 3. As regards water resource the geographical conditions of Rajasthan are not favourable? Explain.
Answer: Rajasthan's geographical conditions are largely unfavorable for water resources. The state receives very little annual average rainfall, and there is a scarcity of perennial rivers. Western Rajasthan is primarily a desert area, making it prone to frequent droughts and famines. Underground water resources are either nonexistent or very limited in quantity. Around 90% of Rajasthan's population relies on groundwater, and approximately 60-70% of the water used for agriculture also comes from underground sources. Years of excessive exploitation of this groundwater have severely depleted the water reserves. This makes it challenging for the region to sustain its population and agricultural needs.
In simple words: Rajasthan does not have good water conditions. It gets little rain, has few rivers, and the western part is a desert with many droughts. Most people and farms use underground water, which has been used up too much.

🎯 Exam Tip: Mention key geographical features like low rainfall, lack of perennial rivers, desert terrain, and reliance on groundwater to explain the unfavorable conditions.

 

Question 4. Write any five important facts regarding water conservation?
Answer: Here are five important facts about water conservation:
1. About 2.5% of all water is lost through evaporation, highlighting the need for efficient storage and usage.
2. India has 22 lakh tubewells, which is the highest number in the world, showing its reliance on groundwater.
3. March 22nd is celebrated as World Water Day, to raise global awareness about water issues.
4. In Rajasthan, 27 districts have overly saline water, 30 districts have too much fluoride, and 28 districts have excessive iron, indicating widespread water quality issues.
5. Out of 236 blocks in Rajasthan, 140 zones have been declared "Dark Zones" and 50 zones as "Grey Zones," indicating severe groundwater depletion. Dark Zones are areas where groundwater extraction greatly exceeds recharge.
In simple words: About 2.5% of water is lost to air. India has the most tubewells. March 22nd is World Water Day. Many parts of Rajasthan have bad quality water. Also, many areas in Rajasthan have used up too much groundwater.

🎯 Exam Tip: Use specific numbers and facts to support your points, as they demonstrate thorough knowledge of the topic.

Long Answer Type Questions

 

Question 1. What efforts should be made for the water conservation in the agricultural sector.
Answer: To conserve water in farming, several efforts can be made:
1. Farmers should build Kacha (earthen) or bricked tanks on their farms to collect water. They should also apply rainwater harvesting techniques to store water directly on their land.
2. Farmers should choose to grow crops that require less water, considering the specific water availability in their state. This means selecting drought-resistant varieties or those suited to local rainfall.
3. Cash crops like wheat, rice, and sugarcane use a lot of water. Farmers should avoid growing these crops as much as possible in areas with low water availability. Instead, they should grow crops that need less water.
4. Farmers should use modern irrigation systems like sprinkler and drip irrigation. These systems deliver water directly to the plant roots, significantly reducing water waste compared to traditional flood irrigation.
5. As much as possible, farmers should experiment with new research techniques on their farms to improve agricultural production while using water judiciously. This includes adopting water-efficient farming practices and technologies.
In simple words: Farmers should build tanks to save rainwater, grow crops that need less water, avoid water-hungry crops in dry areas, use sprinkle and drip irrigation, and try new ways to farm that save water.

🎯 Exam Tip: Focus on practical, actionable steps for farmers, including crop selection, water storage, and efficient irrigation methods.

 

Question 2. Suggest the measures to be adopted by the Local self-administration for water- conservation.
Answer: Local self-administration bodies should adopt the following measures to conserve water:
1. Billions of liters of water in urban areas flow into the sewage system. Local administration can recycle and treat this water for watering plants, cleaning floors and utensils, and washing clothes.
2. Making it mandatory to construct tanks or rainwater harvesting systems in all new multi-storeyed buildings before giving approval helps ensure water is collected at the source.
3. Strict penalties should be enforced against those who install booster pumps to draw more water, make illegal connections, or use larger water pipes than legally approved. This helps regulate fair water distribution.
4. Leaks in pipelines should be checked and repaired immediately. Prompt action prevents significant water loss from the public supply.
5. Efforts should be made to restore and revive old water resources using new techniques. This helps bring forgotten or damaged water bodies back into use.
6. Wells and tanks should be cleaned regularly. They should be cleared of silt and mud deposits to maintain their storage capacity and water quality. This ensures that traditional water sources remain effective.
In simple words: Local governments should recycle wastewater, make rainwater harvesting mandatory for new buildings, punish those who waste water or steal it, fix leaky pipes quickly, clean old water sources, and remove dirt from wells and tanks.

🎯 Exam Tip: Structure your answer around what local authorities can *do*, focusing on policy, infrastructure, enforcement, and maintenance.

 

Question 3. What steps are required at the government level for the water conservation? What has been done by the Rajasthan Government?
Answer: I. Steps for Water Conservation at the Government level:
It is the government's main duty to provide clean drinking water as part of public welfare. For this purpose, the National Drinking Water (Potable) Mission was set up in 1986. This confirmed the government's priority to make water available for drinking, agriculture, hydro-electricity, water transportation, and industries.
3. Proper methods should be guaranteed and confirmed to control water pollution and to recycle and treat industrial waste. This helps keep water sources clean and reusable.
4. Effective actions should be taken to improve agricultural and horticultural production through water-efficient techniques and policies. This supports food security without over-straining water resources.

II. The Rajasthan government:
The Rajasthan government has made it compulsory for all government buildings to collect rainwater as part of its Water Conservation Programme. It has also sped up its rainwater harvesting plans to recharge water reservoirs. Rooftop rainwater is collected in trenches and piped directly into the ground, or collected in tanks. This rooftop water can then percolate into the ground through hand pumps and wells, contributing to groundwater replenishment.
In simple words: Governments should provide clean water, stop water pollution from factories, and improve farming methods that save water. The Rajasthan government has made rainwater harvesting a must for its buildings and is working to put collected rainwater back into the ground.

🎯 Exam Tip: Divide your answer into general government actions and specific state-level (Rajasthan) initiatives. Highlight the establishment of missions and compulsory measures.

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