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The Truth About Rainwater Harvesting Methods In 3 Minutes


Rainwater harvesting methods are experiencing an exponential explosion in market growth as a global solution to falling groundwater levels, drought, and agricultural challenges posed to farmers worldwide.


Rainwater Harvesting Forecasted to Experience A Surge in Market Value

Researchers estimate that the increase in awareness regarding rainwater harvesting methods will boost the demand. Another factor contributing to this rising demand for rainwater harvesting methods is an increasing global population which further intensifies the need for clean drinking water.

Forecasts predict that this demand will culminate in a CAGR market growth of 5.70% from 2017 to 2025. The estimated value is expected to reach $1.14 billion by the close of 2025.

Rainwater Harvesting Methods in Australia

In Sydney, a company called Rainwater Tanks Direct is taking steps to improve Australia’s water supply by offering rainwater harvesting tanks and cost-effective, environmentally-friendly plumbing alternatives such as PVC pipe. The Australian government has taken big steps to incorporate this crucial technique to conserve water on the driest continent on earth.

In most of Australia’s rural communities, harvested rainwater is the only source of water available for human consumption. When the proper safety precautions are taken, rainwater is the highest quality water available to mankind according to the Rainwater Knowledge Centre. Rainwater is a gift from nature: pure, sweet, and simple. There are no harsh chemicals involved unlike much of the water that is treated for human consumption throughout the world.

Rainwater Harvesting Methods Then and Now

Rainwater harvesting methods aren’t a recent development of modern technology. For centuries, ancient civilizations have been implementing rainwater harvesting methods. For example, in Istanbul the Romans constructed the impressively large Basilica Cistern for rainwater harvesting beneath the Sunken Palace.

However, modern rainwater harvesting methods have reached new heights exacerbated by the rising demand of the global population. The global rainwater harvesting market is divided into two segments: roof-based and land-based. One of the biggest benefits of land-based rainwater harvesting methods is the increase of ground-water levels utilizing reservoirs, ponds, underground tanks, and ground holes. Over the past several years, ground-water levels have been experiencing severe depletion on a global scale.

What Are The Benefits of Rainwater Harvesting Methods?

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The benefits of developing various rainwater harvesting methods impacts a variety of factors on a global scale including: reducing the carbon footprint, restoring groundwater levels, and serving commercial, agricultural, and domestic purposes as well. Rainwater harvesting methods also benefit mankind in terms of cost-efficiency and easing the energy burden.

Rainwater Harvesting Methods Are Saving Farmer’s Livelihoods in Drought

Financial funding for rainwater harvesting methods are proving to be a lifesaver for small farmers worldwide. In Costa Rica, The Mexican Agency for International Development Cooperation and the United Nations’ Food and Agriculture Organization (FAO) recently developed a program to help farmers finance rainwater harvesting systems. In this drought-prone area, farmers are excited about the new government regulations allowing them to store up to 1,000 cubic meters of rainwater from their roofs.

Rainwater harvesting is an agricultural game changer for farmers in India as well. Just this month, Uttarakhand Chief Minister Trivendra Singh Rawat, proposed implementing the latest rainwater harvesting methods to sustain agriculture in Uttarakhand during a summit on Climate Resilient Mountain Agriculture. He emphasized that only 0.4 percent of rainwater was used in an attempt to rally water conservation efforts.

The authors of an article in Science Magazine estimate that two-thirds of freshwater withdrawals are for irrigation purposes. Unfortunately, the majority of irrigation returns more water to industrial and municipal sources than it does to rivers and groundwater. This irrigation, largely related to agricultural demand, drives 90 to 95% of global scarcity-weighted water use.

A rapid decline in ground-water levels has strained many Indian cities. The Minister for Rural Development told the Press Trust of India that approximately 50% of funds for India’s rural employment act were being utilized for rainwater harvesting methods. Due to declining groundwater levels, the Indian government has imposed new regulations and funding to increase rainwater harvesting. Rooftop rainwater harvesting systems are now mandatory in new buildings in 18 of India’s 28 states according to India’s Press Information Bureau.

How Many Rainwater Harvesting Methods Are There?

There are several rainwater harvesting methods that vary depending on the terrain and location. The global rainwater harvesting market is further divided into various types of rainwater harvesting systems which include: direct pumped, indirect pumped, and indirect gravity type.

The difference between the direct pump rainwater harvesting method and indirect pump rainwater harvesting method is that the direct pump method utilizes a pump installed within the underground tank, and the indirect pump method includes a second booster pump that pressurizes the harvested rainwater supply. The indirect gravity method pumps the harvested rainwater to a higher level tank known as a header tank. From there, the water is dispersed to other outlets by the power of gravity alone.


Water is mankind’s most precious resource when you consider the fact that no human being can typically survive more than three to four days without water. It is imperative that mankind takes steps to conserve the earth’s water supply through rainwater harvesting methods. Australia and many other countries worldwide are leading the way in this crucial endeavor to preserve this precious resource of nature at all costs.