Question: On the morning of April 17, 2009 Cyclone Bijli made landfall just south of a seaport city located on the banks of what river?

full_context: Document 1: Geography of Bangladesh: Bangladesh is a densely-populated, low-lying, mainly riverine country located in South Asia with a coastline of 580 km on the northern littoral of the Bay of Bengal. The delta plain of the Ganges (Padma), Brahmaputra (Jamuna), and Meghna Rivers and their tributaries occupy 79 percent of the country. Four uplifted blocks (including the Madhupur and Barind Tracts in the centre and northwest) occupy 9 percent, and steep hill ranges up to ca 1,000 m high occupy 12 percent in the southeast (the [Chittagong Hill Tracts]) and in the northeast. Straddling the Tropic of Cancer, Bangladesh has a tropical monsoon climate characterised by heavy seasonal rainfall, high temperatures, and high humidity. Natural disasters such as floods and [cyclones] accompanied by storm surges periodically affect the country. Most of the country is intensively farmed, with rice the main crop, grown in three seasons. Rapid urbanisation is taking place with associated industrial and commercial development. Exports of garments and shrimps plus remittances from Bangladeshis working abroad provide the country's three main sources of foreign exchange income.
Document 2: Cyclone Hudah: Cyclone Hudah was a powerful and destructive tropical cyclone that affected Southeast Africa in April 2000. It was the last in a series of three cyclones that impacted Madagascar during the year. Hudah first developed as a disturbance embedded within the monsoon trough on March 22, within the Australian region cyclone basin. Moving westward as the result of a strong subtropical ridge to its south, the storm quickly intensified, and reached Category 2 cyclone intensity on March 25 before entering the Southwest Indian cyclone basin. For various reasons that remain unknown, the cyclone was only designated a name by the time it had crossed into the area of responsibility of the Regional Specialized Meteorological Center in Réunion. Nonetheless, Météo-France (MFR) assigned the name "Hudah" to the cyclone. An eye formed, and the storm intensified into a tropical cyclone on March 27 well to the southeast of Diego Garcia. On April 1, the MFR upgraded it to a very intense tropical cyclone, estimating peak 10 minute winds of 225 km/h (140 mph). By contrast, the Joint Typhoon Warning Center (JTWC) estimated 1 minute winds of 235 km/h (145 mph). Cyclone Hudah maintained peak winds until making landfall just southeast of Antalaha, Madagascar on April 2. It weakened greatly over land, but re-attained tropical cyclone status on April 5 after moving over the Mozambique Channel. Hudah reached 10 minute winds of 160 km/h (100 mph) by the time it made landfall on Mozambique near Pebane, Mozambique, on April 8, and dissipated by the next day.
Document 3: Dhaka: Dhaka (Bengali: ঢাকা , ] ; or ) is the capital and largest city of Bangladesh. The name of the city was spelled as "Dacca", which was an anglicisation name until the current spelling was adopted in 1983 to match with Bengali pronunciation. Located in an eponymous district and division, it lies along the east bank of the Buriganga River in the heart of the Bengal delta. The city is a microcosm of the entire country, with diverse religious and ethnic communities. Dhaka is the economic, cultural and political center of Bangladesh. It is a major financial center of South Asia. It is one of the world's most populated cities and within OIC countries, with a population of 17 million people in the Greater Dhaka Area. It is also the 4th most densely populated city in the world.
Document 4: Cyclone Fantala: Very Intense Tropical Cyclone Fantala was the most intense tropical cyclone of the south-west Indian Ocean in terms of sustained winds. Part of the 2015–16 cyclone season, Fantala formed on 11 April to the south of Diego Garcia, an island in the central Indian Ocean. With a ridge to the south, the storm moved westward for several days while gaining strength, aided by warm waters and decreasing wind shear. Late on 17 April, the Météo-France office on Réunion (MFR) estimated peak 10-minute winds of 250 km/h (155 mph), making Fantala the strongest tropical cyclone of the basin in terms of 10-minute sustained winds. The Joint Typhoon Warning Center (JTWC) estimated peak 1-minute winds of 285 km/h (180 mph), equivalent to Category 5 on the Saffir-Simpson scale and the strongest on record in the south-west Indian Ocean.
Document 5: Cyclone Bijli: Cyclone Bijli (JTWC designation: 01B, also known as Cyclonic Storm Bijli), was the first tropical cyclone to form during the 2009 North Indian Ocean cyclone season. Bijli formed from an area of Low Pressure on April 14. Later that evening, RSMC New Delhi upgraded the low pressure area to a Depression and designated it as BOB 01. The Joint Typhoon Warning Center (JTWC) then issued a Tropical Cyclone Formation Alert for the system and soon after designated it as Tropical Depression 01B. On the evening of April 15, both RSMC New Delhi and the JTWC reported that the system had intensified into a tropical storm, with the former naming it Bilji. Soon after, Bilji reached its peak intensity as it approached the coast of Bangladesh. However, on the morning of April 17, Bijli weakened to a deep depression due to land interaction, before making landfall just south of Chittagong. The remnants of Bilji continued to weaken as they tracked across northern Myanmar, before RSMC New Delhi issued their last advisory on April 18. The word Bijli refers to lightning in Hindi.
Document 6: Dhaka District: Dhaka District, "Dhaka Jela" also "Dhaka Zila") is a district located in central Bangladesh, and is the densest district in the nation. It is a part of the Dhaka Division. Dhaka, the capital of Bangladesh, rests on the eastern banks of the Buriganga River which flows from the Turag to the south of the district. While Dhaka (city corporation) occupies only about a fifth of the area of Dhaka district, it is the economic, political and cultural centre of the district and the country as a whole. Dhaka District is an administrative entity, and like many other cities, it does not cover the modern conurbation which is Greater Dhaka, which has spilled into neighbouring districts, nor does the conurbation cover the whole district, as there are rural areas within the district.
Document 7: 2011 North Indian Ocean cyclone season: The 2011 North Indian Ocean cyclone season was the "least active" tropical cyclone season in the North Indian Ocean since 1993. Only two cyclone storms have formed throughout the year, far below the average of 4-6. The North Indian Ocean cyclone season has no official bounds, but cyclones tend to form between April and December, with peaks in May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean. The scope of this article is limited to the Indian Ocean in the Northern Hemisphere, east of the Horn of Africa and west of the Malay Peninsula. There are two main seas in the North Indian Ocean — the Arabian Sea to the west of the Indian subcontinent, abbreviated "ARB" by the India Meteorological Department (IMD); and the Bay of Bengal to the east, abbreviated "BOB" by the IMD.
Document 8: Meteorological history of Cyclone Leon–Eline: Cyclone Leon–Eline in February 2000 was the third-longest tracked tropical cyclone in the South-West Indian Ocean. On February 1, a tropical low originated within the monsoon trough to the south of Indonesia, and would eventually become Tropical Cyclone Leon in the Australian basin. Moving westward, the storm fluctuated in strength due to changes in the atmosphere, mostly increasing and decreasing wind shear. After crossing 90° E, the Météo-France office in Réunion (MFR) began tracking the system as Tropical Storm Eline on February 8. The storm continued across the Indian Ocean and intensified greatly as it approached the east coast of Madagascar. Late on February 17, Eline made landfall near Mahanoro, with 10‑minute winds of 165 km/h (105 mph). The storm rapidly weakened over land, but restrengthened in the Mozambique Channel to reach peak 10‑minute winds of 185 km/h (115 mph). On February 22, Eline made landfall about 80 km (50 mi) south of Beira, Mozambique near peak intensity and quickly weakened over land. The well-defined circulation moved across southern Africa, finally dissipating over eastern Namibia on February 29.
Document 9: Cyclone Gonu: Super Cyclonic Storm Gonu (also simply known as Cyclone Gonu) is the strongest tropical cyclone on record in the Arabian Sea, and is also the strongest named cyclone in the northern Indian Ocean. The second named tropical cyclone of the 2007 North Indian Ocean cyclone season, Gonu developed from a persistent area of convection in the eastern Arabian Sea on June 1, 2007. With a favorable upper-level environment and warm sea surface temperatures, it rapidly intensified to attain peak winds of 235 km/h (145 mph) on June 4, according to the India Meteorological Department. Gonu weakened after encountering dry air and cooler waters, and early on June 6, it made landfall on the easternmost tip of Oman, becoming the strongest tropical cyclone to hit the Arabian Peninsula. It then turned northward into the Gulf of Oman, and dissipated on June 7 after making landfall in southern Iran, the first landfall in the country since 1898.
Document 10: Kolkata: Kolkata is the capital of the Indian state of West Bengal. Located on the east bank of the Hooghly River, it is the principal commercial, cultural, and educational centre of East India, while the Port of Kolkata is India's oldest operating port and its sole major riverine port. In 2011, the city had a population of 4.5 million, while the population of the city and its suburbs was 14.1 million, making it the third-most populous metropolitan area in India. Recent estimates of Kolkata Metropolitan Area's economy have ranged from $60 to $150 billion (GDP adjusted for purchasing power parity) making it third most-productive metropolitan area in India, after Mumbai and Delhi. Kolkata (] is also known as Calcutta , the official name until 2001).
Document 11: Bangladesh: Bangladesh ( or ; Bengali: "Bāṃlādēśa" , ] ,  "The country of Bengal"), officially the People's Republic of Bangladesh (গণপ্রজাতন্ত্রী বাংলাদেশ "Gaṇaprajātantrī Bāṃlādēśa" ), is a country in South Asia. It shares land borders with India and Myanmar (Burma). Nepal, Bhutan and China are located near Bangladesh but do not share a border with it. The country's maritime territory in the Bay of Bengal is roughly equal to the size of its land area. Bangladesh is the world's eighth most populous country. Dhaka is its capital and largest city, followed by Chittagong, which has the country's largest port.
Document 12: Typhoon Gay (1989): Typhoon Gay, also known as the Kavali Cyclone of 1989, was a small but powerful tropical cyclone that caused more than 800 fatalities in and around the Gulf of Thailand in November 1989. The worst typhoon to affect the Malay Peninsula in 35 years, Gay originated from a monsoon trough over the Gulf of Thailand in early-November. Owing to favorable atmospheric conditions, the storm rapidly intensified, attaining winds of more than 120 km/h (75 mph) by 3 November. Later that day, Gay became the first typhoon since 1891 to make landfall in Thailand, striking Chumphon Province with winds of 185 km/h (115 mph). The small storm emerged into the Bay of Bengal and gradually reorganized over the following days as it approached southeastern India. On 8 November, Gay attained its peak intensity as a Category 5–equivalent cyclone with winds of 260 km/h (160 mph). The typhoon then moved ashore near Kavali, Andhra Pradesh. Rapid weakening ensued inland, and Gay dissipated over Maharashtra early on 10 November.
Document 13: Chittagong: Chittagong is a major coastal seaport city and financial centre in southeastern Bangladesh. The city has a population of more than 2.5 million while the metropolitan area has a population of 4,009,423 at the 2011 Census, making it the second largest city in the country. It is the capital of an eponymous district and division. The city is located on the banks of the Karnaphuli River between the Chittagong Hill Tracts and the Bay of Bengal. Much of Chittagong Division is located within the ecological Indo-Burma zone on the boundary of the India Plate and Burma Plate. This makes Chittagong the crossroads of the Indian subcontinent and Southeast Asia. The port city has been known by various names in history, including Chatigaon, Chatigam, Chattagrama, Islamabad, Chattala, Chaityabhumi and Porto Grande De Bengala.
Document 14: Medan: Medan (; is the capital of North Sumatra province in Indonesia. Located along the northeastern coast of Sumatra island, Medan is the fourth biggest city by population in Indonesia, behind Jakarta, Surabaya and Bandung. With 2,097,610 inhabitants at the 2010 census, Medan remains the largest settlement outside of Java island together with the richness of its multicultural peoples. Bordered by the Strait of Malacca, Medan is a busy trading city around the island as located near the strait which is one of the most important shipping lanes in the world. Medan is the gateway to the western part of Indonesia, accessible via the Port of Belawan and Kuala Namu International Airport, stated the city as the third largest city in the country by economy after Jakarta and Surabaya, this city economy is linked well with Malaysian cities (especially Penang and Kuala Lumpur) and Singapore by trade, service and natural resource exchanges. Both the seaport and the airport are connected to the city center via toll road and railway. Medan also became the first city in Indonesia to have an airport supported with train service.
Document 15: Typhoon Neoguri (2008): Typhoon Neoguri (] ), known in the Philippines as Typhoon Ambo, was the earliest tropical cyclone on record to strike The People's Republic of China. The first named storm in the 2008 Pacific typhoon season, named after the Korean word for raccoon dog, it formed from a low pressure area on April 13 to the east of the Philippine island of Mindanao, and after crossing the island it intensified into a tropical storm in the South China Sea. Environmental conditions allowed for quick strengthening, with Neoguri attaining typhoon status on April 16. The typhoon reached its peak intensity on April 18 as it approached the island of Hainan, and subsequently it turned northward. Due to increased wind shear and cooler waters, Neoguri rapidly weakened and made landfall as a minimal tropical storm in southern China on April 19.
ground_truth: Karnaphuli River