Drainage ditches play a vital role in agriculture around the world. Inadequate drainage systems accelerate water pollution, excessively dry soils during seasonal droughts, and their maintenance becomes an economic burden. Industrial earthmoving equipment makes it easier to maintain straight drainage ditches, but ditching results in increased environmental costs and, over time, profound economic costs.[3]​.

Sustainable canal design can result in ditches that are self-sustaining thanks to the natural geomorphological balance. The slowdown of net sedimentation and erosion results in a net reduction in sediment transport. "Encouraging the development of a natural sinuous flow and a multi-terraced channel cross section appears to be the key to maintaining both the maximum drainage capacity of the ditch and the minimum net transport of pollution and nutrients.[4]​.

Flooding can be a major cause of recurrent crop failures - particularly on heavy soils - and can also seriously disrupt urban economies. Subsurface drainage into ditches offers a way to remove excess water from agricultural fields, or vital urban spaces, without the rates of erosion and pollution transport that result from direct runoff. However, excess drainage causes recurrent crop yield losses due to drought and more serious Urban Heat Island or desiccation problems.

Controlled subsurface drainage" from sensitive areas to vegetated drainage ditches enables a better balance between drainage and water retention needs. The initial investment allows a community to lower local water tables when and where necessary without exacerbating drought problems at other times.[5]​.

The moats are an important water resource widespread in northern Italy and more precisely in the valley of the Po River,[6]​ which over the centuries has made it possible to make the agricultural lands of the municipalities furthest from the rivers more fertile. These ingenious works sometimes also cross urban centers, mixing in the case of large cities like Milan with the largest canals. They are also known as canals and are especially widespread in some areas of Lombardy, crossing in many places the provinces of Milan, Pavia, Bergamo, Mantua and Cremona.

The Car Dyke was, and largely remains, a long ditch running along the western edge of the Fens in eastern England for over 92 km.[7] It is generally accepted as a Roman construction and, for many centuries, was considered to mark the western boundary of the Fens. Its name derives from carr, a word from the century that meant swamp or drained land.[8][9]​.

Foss Dyke, or Fossdyke, connects the River Trent at Torksey with Lincoln, the county town of Lincolnshire, and may be the oldest canal in England still in use. It is believed to have been built around the year 120 AD. C. by the Romans, but there is no consensus among the authors. It was restored in 1121, during the reign of Henry I, and responsibility for its maintenance was transferred to the city of Lincoln by King James I. Improvements made in 1671 included a navigable sluice or lock at Torksey, and warehouses and docks were built at Brayford Pool in the center of Lincoln.

Depending on the place and time, ditches can be protected, managed by the community or the local landowner. In France, for example:

Contenido

Si bien las zanjas cumplen muchas funciones, también pueden tener implicaciones ambientales. Las zanjas mal construidas o mal mantenidas pueden provocar erosión del suelo, contaminación del agua o la alteración de los ecosistemas locales. Por ejemplo, las zanjas de drenaje en áreas agrícolas pueden transportar pesticidas o fertilizantes hacia los ríos y arroyos cercanos, contribuyendo a la contaminación del agua. Además, las zanjas que no están bien diseñadas para el flujo de agua pueden causar inundaciones o un exceso de escorrentía.

En los últimos años, ha habido un impulso hacia la creación de sistemas de drenaje más sostenibles y ecológicos que fomenten la infiltración del agua y minimicen el impacto negativo en el medio ambiente.

Use of herbicides

Herbicides are sometimes used to maintain a ditch or ditch. This is primarily done to prevent weeds from spreading into the adjacent field, but broadleaf herbicides can also be used to produce fodder or hay.[11]​[12]​[13]​ However, if herbicides are used, the resulting green manure (or manure if added to it) cannot necessarily be used on crops, as in some cases the herbicides can damage the crops.[11]​.

In military art, especially in the Middle Ages, a ditch is a long trench in the ground used to create an obstacle around a camp, castle, city, park or enclosure. Eugène Viollet-le-Duc distinguishes between dry ditches, water-filled ditches, embankment or tank-bottom ditches, and lined or unlined ditches.

Moats have been dug since ancient times as a means of protection against attacks or invasions.

In France, the widest and longest of them is the "Neufossé", excavated about 1,000 years ago by Baldwin VI to block the armies coming from the North.[note 1]​.

The moat also prevents the enemy from coming into direct contact with the fortifications. The Château de Brézé, a 17th-century castle located in the commune of the same name, in the department of Maine-et-Loire, ten kilometers south of Saumur, is a good example with the deepest moats in Europe (18 m). In Syria, the citadel of Saladin has a moat 28 m deep.

More recently, trenches have been built to block the advance of motorized vehicles of enemy armies (e.g. anti-tank ditches), it has no relation to water.

In many Vauban fortifications, waterless ditches are called "dry ditches", however a "cunette" ditch, dug in the axis of the ditch, served to drain rainwater and allowed the ditch to dry.

Trenches that are permanently filled with water are called ditches.

Drainage ditches play a vital role in agriculture around the world. Inadequate drainage systems accelerate water pollution, excessively dry soils during seasonal droughts, and their maintenance becomes an economic burden. Industrial earthmoving equipment makes it easier to maintain straight drainage ditches, but ditching results in increased environmental costs and, over time, profound economic costs.[3]​.

Sustainable canal design can result in ditches that are self-sustaining thanks to the natural geomorphological balance. The slowdown of net sedimentation and erosion results in a net reduction in sediment transport. "Encouraging the development of a natural sinuous flow and a multi-terraced channel cross section appears to be the key to maintaining both the maximum drainage capacity of the ditch and the minimum net transport of pollution and nutrients.[4]​.

Flooding can be a major cause of recurrent crop failures - particularly on heavy soils - and can also seriously disrupt urban economies. Subsurface drainage into ditches offers a way to remove excess water from agricultural fields, or vital urban spaces, without the rates of erosion and pollution transport that result from direct runoff. However, excess drainage causes recurrent crop yield losses due to drought and more serious Urban Heat Island or desiccation problems.

Controlled subsurface drainage" from sensitive areas to vegetated drainage ditches enables a better balance between drainage and water retention needs. The initial investment allows a community to lower local water tables when and where necessary without exacerbating drought problems at other times.[5]​.

The moats are an important water resource widespread in northern Italy and more precisely in the valley of the Po River,[6]​ which over the centuries has made it possible to make the agricultural lands of the municipalities furthest from the rivers more fertile. These ingenious works sometimes also cross urban centers, mixing in the case of large cities like Milan with the largest canals. They are also known as canals and are especially widespread in some areas of Lombardy, crossing in many places the provinces of Milan, Pavia, Bergamo, Mantua and Cremona.

The Car Dyke was, and largely remains, a long ditch running along the western edge of the Fens in eastern England for over 92 km.[7] It is generally accepted as a Roman construction and, for many centuries, was considered to mark the western boundary of the Fens. Its name derives from carr, a word from the century that meant swamp or drained land.[8][9]​.

Foss Dyke, or Fossdyke, connects the River Trent at Torksey with Lincoln, the county town of Lincolnshire, and may be the oldest canal in England still in use. It is believed to have been built around the year 120 AD. C. by the Romans, but there is no consensus among the authors. It was restored in 1121, during the reign of Henry I, and responsibility for its maintenance was transferred to the city of Lincoln by King James I. Improvements made in 1671 included a navigable sluice or lock at Torksey, and warehouses and docks were built at Brayford Pool in the center of Lincoln.

Depending on the place and time, ditches can be protected, managed by the community or the local landowner. In France, for example:

Contenido

Si bien las zanjas cumplen muchas funciones, también pueden tener implicaciones ambientales. Las zanjas mal construidas o mal mantenidas pueden provocar erosión del suelo, contaminación del agua o la alteración de los ecosistemas locales. Por ejemplo, las zanjas de drenaje en áreas agrícolas pueden transportar pesticidas o fertilizantes hacia los ríos y arroyos cercanos, contribuyendo a la contaminación del agua. Además, las zanjas que no están bien diseñadas para el flujo de agua pueden causar inundaciones o un exceso de escorrentía.

En los últimos años, ha habido un impulso hacia la creación de sistemas de drenaje más sostenibles y ecológicos que fomenten la infiltración del agua y minimicen el impacto negativo en el medio ambiente.

Use of herbicides

Herbicides are sometimes used to maintain a ditch or ditch. This is primarily done to prevent weeds from spreading into the adjacent field, but broadleaf herbicides can also be used to produce fodder or hay.[11]​[12]​[13]​ However, if herbicides are used, the resulting green manure (or manure if added to it) cannot necessarily be used on crops, as in some cases the herbicides can damage the crops.[11]​.

In military art, especially in the Middle Ages, a ditch is a long trench in the ground used to create an obstacle around a camp, castle, city, park or enclosure. Eugène Viollet-le-Duc distinguishes between dry ditches, water-filled ditches, embankment or tank-bottom ditches, and lined or unlined ditches.

Moats have been dug since ancient times as a means of protection against attacks or invasions.

In France, the widest and longest of them is the "Neufossé", excavated about 1,000 years ago by Baldwin VI to block the armies coming from the North.[note 1]​.

The moat also prevents the enemy from coming into direct contact with the fortifications. The Château de Brézé, a 17th-century castle located in the commune of the same name, in the department of Maine-et-Loire, ten kilometers south of Saumur, is a good example with the deepest moats in Europe (18 m). In Syria, the citadel of Saladin has a moat 28 m deep.

More recently, trenches have been built to block the advance of motorized vehicles of enemy armies (e.g. anti-tank ditches), it has no relation to water.

In many Vauban fortifications, waterless ditches are called "dry ditches", however a "cunette" ditch, dug in the axis of the ditch, served to drain rainwater and allowed the ditch to dry.

Trenches that are permanently filled with water are called ditches.