Malaysia- FAO's Information System on Water and Agriculture
- 1 Introduction
- 2 Geography and population
- 3 Climate and water resources
- 4 Water withdrawal
- 5 Irrigation and drainage development
- 6 Institutional environment
- 7 Trends in water resources management
- 8 References and Further Reading
Malaysia (Malaysia- FAO's Information System on Water and Agriculture) is situated in southeast Asia. It consists of two regions: peninsular Malaysia in the west lying between Thailand and Singapore, and the states of Sabah and Sarawak located in the east on the island of Borneo. The two regions are separated by the South China Sea. The total land area of the country is 328550km². Malaysia is a federal country, divided into 13states plus the federal territories of Kuala Lumpur and Labuan Island
The Food and Agriculture Organization of the United Nations (FAO) leads international efforts to defeat hunger. Serving both developed and developing countries, FAO acts as a neutral forum where all nations meet as equals to negotiate agreements and debate policy. FAO is also a source of knowledge and information.
Geography and population
In peninsular Malaysia, a mountainous spine known as Banjaran Titiwangsa sepa-rates the east of the peninsula from the west. About 61percent of the peninsula is below 100m above sea level and the land is generally suitable for cultivation. The interior of Sabah is criss-crossed by a series of mountain ranges and hills, the most prominent of which is the Crocker range with the highest point at Gunung Kinabalu (4101 m). Sarawak is generally mountainous with the highest range forming the border with Indonesia.
In 1996, the total cultivable area was 14.17millionha, or 43percent of the total land area. About 5095818ha, or 36percent of the cultivable area, were cultivated. Permanent crops represented 91percent of this cultivated area, while the remaining 9percent (445700ha) was under annual crops, mainly paddy. The agriculture sector is divided into large-scale plantations concentrating on three crops (rubber, oil palm and cocoa), and smallholders who constitute the majority of the farming population.
In 1996, the population of Malaysia was estimated at 20.58millioninhabitants (45.5percent rural). The population is concentrated along the west coast of peninsular Malaysia and in the capital city, Kuala Lumpur. The average population density in Malaysia is 63inhabitants/km². The Malaysian population grew at an average annual rate of 2.8percent in the 1980s, but the rate has since slowed to the current 2.3percent.
The total active population is estimated at 8321000inhabitants, of whom 22percent are engaged in agriculture. The contribution of agriculture to GDP declined from 18.7percent in 1990 to 13.6percent in 1995. In the same year, the agriculture sector contributed 19.1percent of export earnings. Palm oil, rubber and saw logs account for more than 58percent of total agricultural exports.
Climate and water resources
Malaysia lies entirely in the equatorial zone. The climate is governed by the regime of the northeast and southwest monsoons. The northeast monsoon blows from October to March, and is responsible for the heavy rains which hit the east coast of the peninsula and frequently cause widespread floods. It also causes the wettest season in Sabah and Sarawak. The southwest monsoon period occurs between May and September, and is a drier period for the whole country. The period between these two monsoons is marked by heavy rainfall.
The average temperature throughout the year is very stable (26°C), and the mean annual rainfall is 3000mm. Regional variations in temperature and rainfall are mainly due to relief, e.g. the Cameron Highlands have a mean temperature of 18°C and an annual rainfall of over 2500mm, compared to Kuala Lumpur's 27°C and 2400mm. In general, Sabah and Sarawak experience more rainfall (3000-4000mm) than the peninsula. The humidity is high (80percent) due to the high evaporation rate.
River basins and water resources
Peninsular Malaysia is drained by a dense network of rivers and streams (there are about 150major river basins), the longest being the Pahang River which follows a course of 434km before reaching the South China Sea. It drains a catchment area of 29000km². Other major rivers that also drain into the South China Sea are the Kelantan, Terengganu, Dungun, Endau and Sedili rivers. Major river basins in the east of Malaysia tend to be larger than those in peninsula Malaysia. Malaysia's longest river is the Rajang River (563km) in Sarawak.
Out of an annual rainfall volume of 990km³, 360km³ (36percent) are lost to evapotranspiration. The total surface runoff is 566km³, and about 64km³ (7percent of the total annual rainfall) contribute to groundwater recharge. However, about 80percent of the groundwater flow returns to the rivers and is therefore not considered an additional resource. The total internal water resources of Malaysia are estimated at 580km³/year.
Major floods occurred in 1967, 1971, 1973 and 1983. Some 29000km² are considered as flood-prone areas, affecting about 2.7millionpeople. The average annual economic damage caused by floods was estimated at US$40millionin 1980.
Lakes and dams
On the west coast of peninsular Malaysia, the low gradient has resulted in large extensions of tidal flats and swamps. One of the swamp lakes is Lake Tasek Bera in Pahang State, with an area of 61.5km².
Malaysia has a total of 56 dams, of which 32 are more than 15m high. The gross theoretical hydropower potential of peninsular Malaysia is 123000 GWh/year, and that of Sabah and Sarawak together is 107000 GWh/year. In 1995, the total hydropower generation was about 5800 GWh, or 30percent of all power production in Malaysia.
The annual internal renewable water resources are estimated at 630km³. As surface water is readily available throughout the year, it is abstracted mainly for irrigation and domestic uses. The groundwater potential is limited to some pockets of the coastal region and is generally exploited by rural people to supplement their piped water supply. Surface water represents 97percent of the total water use, while groundwater represents 3percen. About 60-65percent of groundwater utilization is for domestic and/or municipal purposes, 5percent for irrigation and 30-35percent for industry.
In 1995, the total production of drinking water from treatment plants was 3.95km³, while the quantity supplied to domestic and industrial sectors was only 2.98km³.
About 32percent of the water produced is lost in the distribution system due to several factors such as pipe leakage, under-metering, and other unaccounted water losses.
Water supply is undertaken by government agencies and privatized water companies. The coverage for water supply is 99percent for urban areas and 77percent in the rural areas.
The total water demand increased from 8.7km³ in 1980 to 12.7km³ in 1995, and is projected to increase to 15.2km³ by 2000. Irrigation currently accounts for about 9.7km³ or about 76percent of the total water consumption. However, irrigation demand is expected to taper off as no further expansion in irrigated paddy cultivation is envisaged.
Irrigation and drainage development
In Malaysia, the potential irrigable area accounts for about 413700ha. Irrigation development dates back to the end of the eighteenth century. The Kerian irrigation schemes were the first large schemes to be constructed, in 1892. Since the formation of the Department of Irrigation and Drainage in 1932, irrigated areas for paddy cultivation have progressively increased. By 1960, about 200000ha had been developed, the emphasis then being on supplementing rainfall for single crop cultivation.
During the 1960s and early 1970s, the introduction of double cropping of rice cultivation required the development of adequate water resources for the second cropping season. During the 1980s, the priority for irrigation took on a new dimension with the need to rationalize rice cultivation and increase its productivity. The Government developed a policy to concentrate efforts in irrigation development in eight large irrigated areas, designated as granary areas of the country and totalling 210500ha. They are the irrigated areas of Kada, Seberang Muda Perai, Trans Perak, Northwest Selangor, Kerian-Sungai Manik, Besut and Kemasin-Semarak.
Malaysia has over 932 irrigation schemes covering an area of 340633ha, comprising 8granary schemes (210500ha), 74 mini-granary schemes (29500ha) and 850 non-granary schemes (100633ha). The non-granary schemes are scattered all over the country and their size varies between 50and 200ha. In addition, there are 21967ha which are inundation and control drainage schemes (1994 estimates). The total irrigation areas was estimated at 362600ha in 1994.
Irrigation is predominately for paddy cultivation and to a minor extent for vegetables and cash crops. Paddy cultivation is mostly carried out by individual farmers working on small plots of about 1-1.5ha. Irrigation facilities for double cropping are mainly focused on the eight main granary schemes and the 74 mini-granary schemes, with an average cropping intensity of 150percent. The current irrigation efficiency is around 35-45percent with a water productivity index for rice of about 0.2kg/m³. The average yield for irrigated rice was 4t/ha in 1995.
In the major irrigation schemes, flooding irrigation is practised on paddy fields, and the water depth is controlled individually by the farmers. Major irrigation schemes are designed with proper farm roads to cater for farm mechanization especially for ploughing and harvesting. Most of the irrigation schemes are provided with separate drainage facilities. The issues of salinity, waterlogging and water-borne diseases are not reported as being significant.
Farmers pay nominal irrigation charges which vary from US$3 to 15/ha/year. It is estimated that fees collected from farmers cover only 10-12percent of the actual operational cost. The Government does not seek full cost recovery because the farming community is considered a low income group. A total of US$917 million have been spent on irrigation development by the Government since 1970.
The long-term objectives of irrigation development are:
- to provide infrastructure for 74 secondary granary areas in order to raise the cropping intensity from 120to 170percent by 2010;
- to provide infrastructure for the main granary areas in order to raise the cropping intensity from 160to 180percent by 2010;
- to convert 120 small paddy schemes to other crops by 2010;
- to develop 20 small reservoirs, 100 groundwater tube-wells and 4 dams by 2010 in order to provide reliable irrigation by introducing new technologies and modern management to increase crop production.
In 1994, the total drained areas was 940 633ha. About 600000ha were drained for oil palm cultivation, using public funding for smallholders.
The responsibility for water resources planning and development is shared by various government agencies. Malaysia has no single water resources authority for an overall coordinated planning and integrated river management approach.
The Department of Irrigation and Drainage (DID), under the Ministry of Agriculture, is responsible for the planning, implementing and operation of irrigation, drainage and flood control projects throughout the country.
The Department of Agriculture (DOA) is responsible for providing advice and extension services to the farmers.
In the water supply sector, the Public Works Department (PWD), under the Ministry of Public Works, is responsible for the planning, implementation and operation of urban water supply projects. However, in line with the Government's privatization policy, many water supply projects have already been taken over by water supply companies or privatized.
The Ministry of Health (MOH) provides untreated but drinkable water to rural communities not served by the local water authorities. The MOH also monitors water quality at water treatment plant intakes as well as the quality of water within the distribution system for compliance with national drinking water standards.
The control of water pollution is the responsibility of the Department of Environment (DOE), which is empowered to enforce compliance with effluent standards for point sources of pollution. The Ministry of Housing and Local Governmentis responsible for compliance with regulations and standards on sewerage works which have been privatized to a national sewerage company.
Although either directly or indirectly much legislation touches on water resources, most of the existing laws are considered outdated. The Water Act of 1920 is inadequate for dealing with the current complex issues related to water abstraction, pollution and river basin management.
Trends in water resources management
Agriculture will remain the main user of water in the future. However, its importance will decline from the present 76 percent to about 70 percent of total water consumption by 2000. In the irrigation sector, future efforts will focus on demand management through improved water management rather than on supply management.
Future trends in paddy cultivation will focus on group farming as practised in the Trans Perak Area Integrated Agriculture Development Scheme. In the long term, sustainable paddy cultivation will depend on the setting up of effective farmers' organizations. A more business-oriented paddy farming is seen as a way to reduce government subsidies to small farmers. Owing to the high cost of paddy production, the National Agriculture Policy (1992-2010) aims to reduce gradually the country's self-sufficiency in rice from the current 80to 65percent.
In the water resources sector, there is a need to review the planning and development of dams. Most of the existing dams were generally designed for one single purpose by various government agencies and privatized utility companies. Future dams will be designed with consideration for multipurpose usage through improved coordination and the optimization of resources. There is also an urgent need to address the issue of water pollution, which could have a serious economic impact if left unchecked. The Government is studying the feasibility of setting up a national body to manage the rivers as well as the creation of a national water council to improve federal-state government cooperation in water resources management.
References and Further Reading
- Department of Agriculture. 1994. Paddy statistics of Malaysia: Peninsular Malaysia, p. 124.
- Department of Environment. 1994. Environmental quality report. Malaysia.
- Department of Forestry, Peninsular Malaysia. 1994. Annual report. Malaysia.
- Department of Irrigation and Drainage. 1982. National water resources study, p. 7-14. Main Report, Vol. 1. Master Action Plan. Malaysia.
- Department of Statistics. 1997. Statistics handbook, p. 74. Malaysia.
- Economic Planing Unit, Prime Minister's Department. 1996. Seventh Malaysia plan. Malaysia.
- Neo,T.L. 1996. Proceedings of the regional seminar on integrated river basin management. Melaka. Malaysia, Vol.1.