idukki: the land today

Idukki is Kerala's largest district at around 5,100 square kilometres. Despite the size, Idukki has no coastline, no plains to speak of, and no major city. Most of the district sits above 600 metres and the terrain is a heavily dissected plateau, cut through by rivers and valleys, with elevation shifting constantly between ridge, slope, and gorge rather than a flat highland. To someone arriving from the lowlands, the district announces itself as forest and mist before anything else. The sudden difference in temperature and air pressure felt on ascending to the district is quite an experience on its own.

the terrain

The northern part of the district forms a sub-plateau higher than the rest, where the tallest peaks sit, including Anamudi at 2,695 metres, the highest point in peninsular India. The Periyar, Kerala's longest river, originates here. So does the Pamba. The western part of the district is covered by forests and hills bordering Ernakulam and Kottayam, with places like Vagamon and Kuttikanam in this stretch. The eastern frontier runs along the Tamil Nadu border, where the hills slope down toward the Cumbum valley on the other side.

the towns

Idukki has two municipal towns: Kattappana and Thodupuzha. Thodupuzha is the larger of the two, sitting in the semi-elevated river plains in the west. Munnar, in the north, is the most visited settlement in the district. Kumily, in the east near Thekkady, is a plantation and trade town at the edge of the Periyar wildlife sanctuary. Most people live not in any of these but scattered across the hills in small settlements and estates. Many of these settlements go by the name "city" locally: a quirk of the district's geography, where a cluster of shops and houses on a hillside earns the word before a town ever forms around it. Idukki is a district of many cities without actually having any. 

tea country

The image most people carry of Idukki is Munnar. Munnar sits at around 1,600 metres above sea level at the confluence of three mountain streams, the Muthirapuzha, Nallathanni, and Kundala, from which it takes its name. The rolling hills around it are blanketed in tea estates, a landscape shaped by British planters in the late nineteenth century who found the altitude and cool climate ideal for the crop. Vagamon, further south along the Kottayam border, carries the same character: rolling tea gardens, pine forests, and mist-covered valleys at around 1,100 metres. This is the Idukki that appears in photographs, and it occupies the northern and western reaches of the district.

the dams

Dams are indeed part of the Idukki landscape, not separate from it. Idukki holds more dams than any other district in Kerala: of Kerala's 59 dams under the state electricity board, 24 are in Idukki. The number, however, does not include the numerous check dams across the district. The Idukki arch dam spans the Periyar at a natural granite gorge and is among the largest arch dams in Asia. Together with the Cheruthoni and Kulamavu dams it forms a single reservoir system. Around 66 percent of Kerala's power generation comes from hydroelectric projects within the district. Mullaperiyar, older and politically contested, sits on the Tamil Nadu border and has been a live dispute between the two states for decades. The rivers that shaped this district also power much of the state.

the cardamom hills

The cardamom country is the eastern frontier: Kumily, Kattappana, Nedumkandam, Rajakumari. This stretch constitutes the Cardamom Hills proper. If you enter the district from Kottayam or through Munnar from Cochin, you pass through tea first. The cardamom hills are further east, above 900 metres, on the other side of the Periyar river, with a colder and more consistently humid climate than the rest of the district. The Cardamom Hills as a named range cover roughly 2,800 square kilometres along the eastern frontier.

rainfall and weather

Idukki receives rain from two monsoons: the southwest from June to August, and the northeast in October and November. But the district is large enough that rainfall varies sharply by location, from 2,500 mm annually in the drier pockets to over 4,250 mm on the western slopes facing the sea. The Pambar valley around Marayoor in the east sits in a rain shadow and is noticeably drier than the rest of the district. The western slopes receive the heaviest rainfall in Kerala.

Elevation shapes temperature as sharply as it shapes rainfall. The lowland approaches are warm and humid year round. The eastern highlands can drop to near zero between November and January. During periods of heavy rain, night travel bans across the ghat roads are common, a practical measure in terrain where a road can disappear overnight. The 2018 floods showed why this is not an overreaction. Every road into Idukki was cut off for weeks. Families in the district were unreachable, not by phone or road or any other way. It took me weeks after the water receded before I could attempt the drive home from Kochi. 

what grows here

The land produces what the conditions allow. Tea at the northern altitudes, where the cool plateau and colonial infrastructure already existed. Cardamom on the eastern frontier, where the elevation, humidity, and forest cover are right for it. Rubber at lower elevations in the western reaches. Coffee across the mid-range slopes. Pepper climbing whatever it can find. The variety is not coincidence. It follows from a district that contains, within its 5,100 square kilometres, almost every altitude and microclimate the Western Ghats can offer.