Global Map of Irrigation Areas

Taiwan, Province of China

The cultivated area decreased from 667 602 ha in 1990 to 656 676 ha in 1995 [TW01] and to 627 160 ha in 2000 [TW02]. In contrast, the irrigated area increased from 510 500 ha in 1990 to 525 528 ha in 1995 [TW03]. No information was available on the extent of irrigated area per county or irrigated area in 2000. Therefore, irrigated area per county was estimated by using statistics related to irrigated area per region in 1995 [TW03] as well as paddy area per county and other cultivated area per county in 1995 [TW04]. It was assumed that all the paddy area was irrigated and that the fraction of irrigated other fields was constant in all counties within the same region. Plain irrigated areas and paddy areas were digitized from a land-use atlas (scale: 1:1 000 000) [TW05]. For the island of Penghu, satellite imagery [TW06] was used in order to locate arable land.

The distribution of irrigated area by sub-national unit is listed in the table below.

References

[TW01]: Directorate-General of Budget, Accounting and Statistics. 1997. 1995 Agricultural, forestry, fishery and husbandry survey, p. 24. General Report. Taipei, Taiwan Province of China (also available at http://www.dgbas.gov.tw).
[TW02]: Directorate-General of Budget, Accounting and Statistics. 2002. 2000 Agricultural, forestry, fishery and husbandry survey, p. 29. General Report. Taipei, Taiwan Province of China (available at http://www.dgbas.gov.tw).
[TW03]: Directorate-General of Budget, Accounting and Statistics. 1997. 1995 Agricultural, forestry, fishery and husbandry survey, Table 16. General Report. Taipei, Taiwan Province of China (available at http://www.dgbas.gov.tw).
[TW04]: Directorate-General of Budget, Accounting and Statistics. 1997. 1995 Agricultural, forestry, fishery and husbandry survey. Taipei, Taiwan Province of China (available at http://www.dgbas.gov.tw).
[TW05]: Wu, C., ed. 1990. 1:1,000 000 land use map of China. Beijing.
[TW06]: Earth Satellite Corporation. 2004. Landsat GeoCover (2000/ETM+) Edition Mosaics, tile 071-464. Sioux Falls, USA, USGS (available at http://glcfapp.umiacs.umd.edu:8080).

Distribution of irrigated area in Taiwan by County and Region.