In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of land, whether a particular region is dominated by hard or soft rocks, and the gradient of the land. Geomorphologists and hydrologists often view streams as part of drainage basins (and sub-basins). This is the topographic region from which a stream receives runoff, throughflow, and its saturated equivalent, groundwater flow. The number, size, and shape of the drainage basins varies and the larger and more detailed the topographic map, the more information is available.
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đ River systems in the context of Himachal Pradesh
Himachal Pradesh (Hindi: HimÄcal PradeĆ, pronounced [ÉŠÉȘËmĂ€ËtÊÉl pÉŸÉËdÌȘeËÊ]; Sanskrit: himÄcÄl prÄdes; lit. "Snow-laden Mountain Province") is a state in the northern part of India. Situated in the Western Himalayas, it is one of the 13 mountain states and is characterised by an extreme landscape featuring several peaks and extensive river systems. Himachal Pradesh is the northernmost state of India and shares borders with the union territories of Jammu and Kashmir and Ladakh to the north, and the states of Punjab to the west, Haryana to the southwest, Uttarakhand to the southeast and a very narrow border with Uttar Pradesh to the south. The state also shares an international border to the east with the Tibet Autonomous Region in China. Himachal Pradesh is also known as Dev Bhoomi, meaning 'Land of Gods' and Veer Bhoomi which means 'Land of the Brave'.
The predominantly mountainous region comprising the present-day Himachal Pradesh has been inhabited since pre-historic times, having witnessed multiple waves of human migrations from other areas. Through its history, the region was mostly ruled by local kingdoms, some of which accepted the suzerainty of larger empires. Prior to India's independence from the British, Himachal comprised the hilly regions of the Punjab Province of British India. After independence, many of the hilly territories were organised as the Chief Commissioner's province of Himachal Pradesh, which later became a Union Territory. In 1966, hilly areas of the neighbouring Punjab state were merged into Himachal and it was ultimately granted full statehood in 1971.
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River systems in the context of List of river systems by length
This is a list of the longest rivers on Earth. It includes river systems over 1,000 kilometres (620Â mi) in length.
River systems in the context of ThĂĄi BĂŹnh river system
The ThĂĄi BĂŹnh river system is one of the two major river systems in the Red River Delta, Vietnam; the other one is the Red River system. Both split from the Red River in the HÆ°ng YĂȘn province. The system consists of 8 rivers flowing in northern Vietnam. This system joining with Red River system creates the Red River Delta.
The part of it between HÆ°ng YĂȘn and the sea, in combination with the part of the Red River from Hanoi to HÆ°ng YĂȘn, was called the River of Tonkin by historical Dutch and English texts.