In 1850, Almería inaugurated one of the largest hydraulic works in 19th century Spain. It was a complete disaster

It is May 8, 1850, Níjar (Almería). Although the promoters have been trying for months, finally the inauguration of the Isabel II reservoir will not have the physical presence of the Queen which gives it its name. But they are not going to let that ruin the moment, their moment. We talk about what may be the largest hydraulic work of the Andalusian 19th century and one of the most ambitious on the peninsula: 35 meters of stonework built at will by more than a thousand private investors that culminate the old dream of the Duchess of Abrantes, to build a dam along the Rambla del Carrizal. A dam doomed to failure. Money in abundance. In 1821, in the heat of the mining boom in the Sierra Almagrera of Almería, Diego María Madollel He created ‘Irrigation of Níjar’ and obtained tax exemptions from the crown. The idea was simple: build a stone structure 44 meters long and 35 meters high with the idea of ​​irrigating more than 18,000 hectares in Campo de Níjar and Campohermoso. Over the next 40 years, Madollel would learn that there are many ways to fail. The first was almost immediate. The second took almost twenty years and the third, in 1842, with the constitution of the Níjar Reservoir Company, seemed to be the good one. The businessman gathered more than a thousand shareholders from Almería, Murcia, Málaga, Madrid and Valencia (people who had become rich from the mines, wanted to invest, but did not know much about the matter) and got the state to declare the project a ‘public utility’; but, five years later, the project could not get off the ground. It wouldn’t have started, but In 1848 the drought began. A persistent, sharp and prophetic drought… but that promoted the construction of the swamp. Madollel saw his opportunity and began selling water rights. The construction moved forward, the Murcian Jerónimo Ros took control of the construction and by 1857 not only the dam was finished, but also a very complex system of irrigation canals and pipes. Madollel had built a hydrological Ferrari: but the road was not in condition to go more than 20 kilometers per hour. How much everything goes wrong. Despite the very long development, the promoters did almost everything wrong. To begin with, they did not carry out hydrological studies of the area and that prevented them from realizing that the riverbed did not have enough flow to fill the reservoir or to irrigate 18,000 hectares. Furthermore, they did not realize that the regime of the boulevard was ‘torrential’: when it rains, it does so torrentially and that causes enormous amounts of sediment to be washed away. By 1871, the reservoir was completely blocked. The failure was enormous. Or almost. Because, although it is true that today the prey is a relic for hikersthe truth is that Madollel did have some vision. Today the Campo de Níjar is the epicenter of one of the largest seas of plastics in the country. The hydrological pressures are the same or worse, but this shows that it doesn’t matter how many times the climate twists our hand, the man is there to try again. Image | ANE In Xataka | The reservoir that would “never be filled” is opening its floodgates: 23 years later, the largest swamp in Western Europe is completely full

The rebirth of an old system that is illuminating remote villages in India: the hydraulic wheel

While the big cities They have opted for self -consumption through solar panels and even wind turbinesmany remote areas of the world still fight to have a renewable system. However, in Kashmir, they have found a cheap, effective and inspired solution in the past: the hydraulic wheel. An old advance. Surely the name of the hydraulic wheel will not come a direct image to the head, but if I describe a inn away from an village in the central European area, which had a large wheel shape that spinned with the water can be more enlightening. The fact is that they were important during the industrial revolution To perform mechanical tasks such as milling or hammering. However, its use began to decrease with the expansion of burning fossil fuels and the development of electricity. However, like fashions, everything comes back, and more if the original idea was good. So with the rise of renewable energies, hydraulic wheels have resurfaced as a viable option to produce electricity in a clean and continuous way in remote and impoverished areas. A new clean source. Initial investments in renewables usually have a high cost that not everyone can afford. But what if they turn to an old energy system? That is what a group of researchers from the Technical University of Munich thought that They have managed to install A hydraulic wheel in a town of Kashmir, India. The wheel in question measures about two meters and lets the stream water pass to produce electricity. In this way, it provides an uninterrupted energy source to the community, so it does not need centralized power, which was previously a problem with frequent cuts. In addition, the hydraulic wheel is accompanied by the use of other renewable energy systems, including the Decentralized microredwhich allows the inhabitants of the people to enjoy energy independence and resilience before a possible blackout. Self -sufficient One of the highlights of the hydraulic wheel is its high efficiency, reaching the 85% energy conversion. As for the assembly cost of this system, it is relatively low, around $ 1,000, so it makes them accessible to different impoverished rural communities. In addition, the design is available on the Internet for free. Only in rural areas. Hydraulic wheels are designed for rural and remote areas, specifically in communities that need a continuous and reliable energy source. This type of system offers a simple and economical way to generate electricity without depending on fossil fuels or intermittent energy sources. In addition, its environmental impact is minimal, since they do not emit carbon and, According to studiesdamage to aquatic life is reduced. While this type of technology has limitations and is not suitable for all contexts, its potential to improve the energy self -sufficiency of small communities could make a considerable difference. More for the world. The benefits of this technology are not limited to Kashmir. A similar system has been implemented in Nepal and a prototype has been developed in Tegernsee, Germany. In addition, in Northern Ireland, a hydraulic wheel has been restored with an old mill in Fermanagh County, which now supplies electricity to a restaurant. Image | The Waterwheel Project V1.0 Xataka | China prepares the most expensive megaestructure on the planet: a hydroelectric power plant on the most controversial place possible

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