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Khazan System
The Khazan is a traditional farming system of Goa, India. It comprises mainly rice-fish fields established on relciamed coastal wetlands, salt marshes and mangrove forests. It involves construction of levees and sluice gates to prevent sea water from entering the fields. The Bandora (Bandiwade) copper-plate inscription of Anirjita-varman (likely a Konkan Maurya king), dated to 5th-6th century on palaeographical grounds, refers to the khazan system as ''khajjana''. It records the grant of tax-exempt land in Dwadasa-desha (modern Bardez), including one ''hala'' (a unit) of ''khajjana'' land. The recipient of the grant was expected to convert this wetland into a cultivated field by constructing a bund to prevent the salty sea water from entering the land. Historically, an association of villagers (''gaunkari''s) maintained the local khazan fields and its associated levees. This system continued under the Portuguese rule The Portuguese Empire ( pt, Império Português), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rice-fish System
A rice-fish system is a polyculture practice that integrates rice agriculture with aquaculture, most commonly with freshwater fish. This practice is highly valued as it was one of the first to be considered as a “Globally Important Agricultural Heritage System” according to FAO-GEF (Global Environment Facility).Lu, J., & Li, X. (2006). Review of rice–fish-farming systems in China—one of the globally important ingenious agricultural heritage systems (GIAHS). Aquaculture, 260(1-4), 106-113. It is based on a mutually beneficial symbiotic relationship between rice and fish that is developed when introduced into the same ecosystem. Many benefits, including social, economic and environmental come with these systems. History Cultivating rice and fish simultaneously is a practice thought to be over 2,000 years old. Ancient clay models of rice fields containing miniature pieces, and more specifically miniature pieces of fish such as the common carp, have been found in China.Renk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Wetland
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The primary factor that distinguishes wetlands from terrestrial land forms or Body of water, water bodies is the characteristic vegetation of aquatic plants, adapted to the unique anoxic hydric soils. Wetlands are considered among the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal species. Methods for assessing wetland functions, wetland ecological health, and general wetland condition have been developed for many regions of the world. These methods have contributed to wetland conservation partly by raising public awareness of the functions some wetlands provide. Wetlands occur naturally on every continent. The water in wetlands is either freshwater, brackish or saltwater. The main wetland ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Marsh
A salt marsh or saltmarsh, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. It is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs. These plants are terrestrial in origin and are essential to the stability of the salt marsh in trapping and binding sediments. Salt marshes play a large role in the aquatic food web and the delivery of nutrients to coastal waters. They also support terrestrial animals and provide coastal protection. Salt marshes have historically been endangered by poorly implemented coastal management practices, with land reclaimed for human uses or polluted by upstream agriculture or other industrial coastal uses. Additionally, sea level rise caused by climate change is endangering other marshes, through erosion and submersion of otherwise tidal marshes. However, r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangrove Forest
Mangrove forests, also called mangrove swamps, mangrove thickets or mangals, are productive wetlands that occur in coastal intertidal zones. Mangrove forests grow mainly at tropical and subtropical latitudes because mangroves cannot withstand freezing temperatures. There are about 80 different species of mangroves, all of which grow in areas with low-oxygen soil, where slow-moving waters allow fine sediments to accumulate.What is a mangrove forest? National Ocean Service, NOAA. Updated: 25 March 2021. Retrieved: 4 October 2021. Many mangrove forests can be recognised by their dense tangle of prop roots that make the trees appear to be standing on stilts above the water. This tangle of roots allows the trees to handle the daily rise and fall of tides, which means that most mangroves get flooded at least twice per da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Levee
A levee (), dike (American English), dyke (Commonwealth English), embankment, floodbank, or stop bank is a structure that is usually earthen and that often runs parallel to the course of a river in its floodplain or along low-lying coastlines. The purpose of a levee is to keep the course of rivers from changing and to protect against flooding of the area adjoining the river or coast. Levees can be naturally occurring ridge structures that form next to the bank of a river, or be an artificially constructed fill or wall that regulates water levels. Ancient civilizations in the Indus Valley, ancient Egypt, Mesopotamia and China all built levees. Today, levees can be found around the world, and failures of levees due to erosion or other causes can be major disasters. Etymology Speakers of American English (notably in the Midwest and Deep South) use the word ''levee'', from the French word (from the feminine past participle of the French verb , 'to raise'). It originated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sluice Gate
Sluice ( ) is a word for a channel controlled at its head by a movable gate which is called a sluice gate. A sluice gate is traditionally a wood or metal barrier sliding in grooves that are set in the sides of the waterway and can be considered as a bottom opening in a wall. Sluice gates are one of the most common hydraulic structures in controlling flow rate and water level in open channels such as rivers and canals. They also could be used to measure the flow. A water channel containing a sluice gate forms a type of lock to manage the water flow and water level. It can also be an open channel which processes material, such as a River Sluice used in gold prospecting or fossicking. A mill race, leet, flume, penstock or lade is a sluice channeling water toward a water mill. The terms sluice, sluice gate, knife gate, and slide gate are used interchangeably in the water and wastewater control industry. They are also used in wastewater treatment plants and to recover mineral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Water
Seawater, or salt water, is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L, 35 ppt, 600 mM). This means that every kilogram (roughly one liter by volume) of seawater has approximately of dissolved salts (predominantly sodium () and chloride () ions). The average density at the surface is 1.025 kg/L. Seawater is denser than both fresh water and pure water (density 1.0 kg/L at ) because the dissolved salts increase the mass by a larger proportion than the volume. The freezing point of seawater decreases as salt concentration increases. At typical salinity, it freezes at about . The coldest seawater still in the liquid state ever recorded was found in 2010, in a stream under an Antarctic glacier: the measured temperature was . Seawater pH is typically limited to a range between 7.5 and 8.4. However, there is no universally accepted reference pH-scale for seawater and the difference between measuremen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Copper Plate Inscriptions
Indian copper plate inscriptions are historical legal records engraved on copper plates in India. Donative inscriptions engraved on copper plates, often joined by a ring with the seal of the donor, was the legal document registering the act of endowment. It was probably necessary to produce them when required to prove ownership/ the claim to the rights.Thapar, Romila'', The Penguin History of Early India: From the Origins to AD 1300.'' Penguin Books, 2002. 295-96 and 339. The retrievability of the copper plates was perhaps crucial in the newly settled lands. Detailed information on land tenures and taxation available from these copper plate grants. History Indian copper plate inscriptions (''tamarashasana''), usually record grants of land or lists of royal lineages carrying the royal seal, a profusion of which have been found in South India. Originally inscriptions were recorded on palm leaves, but when the records were legal documents such as title-deeds they were etched on a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mauryas Of Puri
The Maurya dynasty ruled the coastal Konkan region in present-day Goa and Maharashtra states of India, between the 4th and the 7th centuries. Their capital was Puri, which is variously identified as Gharapuri (Elephanta), Salsette, or Rajapuri (near Janjira). The dynasty is known only from a few records, and there is very little clarity on its genealogy, chronology, territory, administration and political status. Origin and chronology Historian D.C. Sircar (1942) theorized that the Mauryas of Konkana and the Mauryas of Rajasthan "apparently" claimed descent from the imperial Maurya prince-viceroys of Ujjayini and Suvarnagiri. Later writers have repeated this theory, although no concrete evidence of imperial Maurya rule has been discovered in the Goa region. Northern Konkan The 400 CE Vada inscription from the reign of the Maurya king Suketu-varman, dated to the Shaka year 322, suggests that the Mauryas ruled the northern Konkan region in present-day Maharashtra at t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bardez
''Bardez'' ( kok, Bardes; pt, Bardes; IPA: ) is a ''taluka'' of the North Goa district in the Indian state of Goa. It was a '' concelho'' in the Portuguese State of India before 1961. Etymology The name is credited to the Saraswat Brahmin immigrants who emigrated to the Konkan via Magadha plains in northern India. Bardez, or more properly ''bara'' (twelve) ''desh'' (country), means "twelve countries" (or territories). The form 'country' probably refers to clan territorial limits, or to the Brahmin '' comunidades'', of which the twelve are: # Aldona # Anjuna # Assagao # Candolim # Moira # Nachinola # Olaulim # Pomburpa # Saligao # Sangolda # Serula # Siolim Bardez is delimited on the north by the Chapora River, on the south by the Mandovi River, on the east by the Mapusa River, which originates in Bardez itself near the capital city of Mapusa, and on the west by the Arabian Sea. A native of Bardez is called a ''Bardeskar'' or ''Bardescar'' ( IPA: ) in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bunding
Bunding, also called a bund wall, is a constructed retaining wall around storage "where potentially polluting substances are handled, processed or stored, for the purposes of containing any unintended escape of material from that area until such time as a remedial action can be taken."EPA Guidance Note on Storage and Transfer of Materials for Scheduled Activities page 7 Liquid containment The term can also refer to dikes, but it is frequently used to describe liquid containment facilities that prevent leaks and spillage from tanks and pipe[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portuguese India
The State of India ( pt, Estado da Índia), also referred as the Portuguese State of India (''Estado Português da Índia'', EPI) or simply Portuguese India (), was a state of the Portuguese Empire founded six years after the discovery of a sea route to the Indian subcontinent by Vasco da Gama, a subject of the Kingdom of Portugal. The capital of Portuguese India served as the governing centre of a string of military forts and trade posts scattered all over the Indian Ocean. The first viceroy, Francisco de Almeida established his base of operations at Fort Manuel, after the Kingdom of Cochin negotiated to become a protectorate of Portugal in 1505. With the Portuguese conquest of Goa from the Bijapur Sultanate in 1510, Goa became the major anchorage for the Portuguese Armadas arriving in India. The capital of the viceroyalty was transferred from Cochin in the Malabar region to Goa in 1530. From 1535, Mumbai (Bombay) was a harbour of Portuguese India as '' Bom Bahi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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