Introduction of Irrigation Associations
:::
Yunlin Irrigation Association http://www.ylia.gov.tw
all in [Central Area] / Taiwan Joint
Enviroment
Area
System
Taichung
Pattern
Changhua
Structures
Nantou
Characteristics
Yunlin
Beautification
Photos
Geographical enviroment
This irrigation association is located in the central south of west coast in Taiwan, and in the east,
connecting to Chenyoulan stream of Nantou county, and west part of Central Mountain range, in
the west, facing to the Taiwan straits, starting the limitation from Chuoshui stream in the north
and Santieh stream of Chiayi county in the south.
In the territory, the annual rainfall is averaged at 1,500 mm, and that is rich with uneven
distribution in time and space. It is a rainy period from May ro October, occupying 80% of whole
year rainfall. From November to April of next year, it is dry period, occupying 20%. As the sand
content in this irrigation area is high to be 4/1000, it is very easy to result in blockade in canal
and the maintenance is difficult to do. Administrative areas cross over Chiayi, Yunlin, and
Nantou three counties, including 20 towns and cities.
Irrigation area
Management
Peikang
Office
Huwei
Hsilo
Peitou
Linnai
Total
Area
13,720
13,912
16,129
-
65,727
11
11
11
5
53
22,070
Workstation 15
Irrigation system
Introduction of Irrigation Associations
1. Irrigation water resources – Because there is no reservoir in this territory, the irrigation water
supply resources is extremely unstable. After Chichi dam gate was completed in 2000, it had a
great help to stabilize the water supply for Chuoshui river and to function for the water
regulating. At present, the irrigation water resources in irrigation are are:
a. Surface water: comes from Chuoshui river, Chingshui river, and Peikang river, Huwer river,
etc. natural river flow.
b. Ground water: comes from well digging and power pumping , total 584 wells.
c. Supplemental water resources: makes use fo irrigation system and ditches, ponds, and
spring zone to pump water for recycle use. There are 71 pumping stations with facilities in the
irrigation area.
2. Irrigation canals – Chuokan canal, Touliu canal, Hsinhuwei canal, Luchangko canal, Jiana
canal, and Chichi canals, etc. total 11,109 canals with overall length of 7,467,258 meters.
3. Drainage canals – There are 12,645 drainage canals facilities, large drainage 90 canals,
medium drainage 751 canals, small drainage 11,804 canals, with overall length 6,587,028.
Irrigation pattern and cultivation way
1. Irrigation system – The main irrigation water resources in this territory comes from Chuoshui
river, Chingshui river, and belongs to river flow type. As the water supply resources is extremely
unstable, the supplement water resources is developed by well digginh to pump water for
irrigation. However, for the limitation of shout and torrential rivers, the water quantity is unable
to be sufficient for irrigation. Therefore, in this territory, most of the farmlands maintain a rotary
cultivation under operation.
2. Cultivation way – is divided into double- cropped cultivation, single-cropped cultivation, two
years-one crop cultivation, and three years-one crop cultivation, etc.
Irrigation and drainage canal and major structures under statistics
1. Statistics of irrigation and drainage canal
Irrigation canal
Leading
canal
34,486
Main
canal
Lateral
canal
212,284 459,857
Sublateral
canal
500,010
Supply
ditch
Sub-total
Drainage
canal
Total
6,256,917 7,467,258 6,587,028 14,054,286
Introduction of Irrigation Associations
2. Statistics of main water conservancy structures
Temporary
Gate
dam
(Sluice)
69
3,350
Flume
800
Bridge
7,949
Drop
4,027
Siphon
441
Supply
Measuring
gate
facilities
2,114
1,398
Major corps and characteristics
The major crops of this area is paddy rice, and secondary crops are corn, peanut, potato or taro,
and vegetables.
Canal green beautification
In order to response to the governmental promotion for green beautification, tree are planted
and cultivated with green environment, the following canals are proceeded with programming
project:
1. Linnai water distributing work is the most famous pattern In Taiwan, and it has multi purpose
to distribute the water. After the completion of the surrounding of distribution work and green
work, it has become demo zone for wide education and teaching purpose. Moreover, it provides
an excellent green entrainment world for the people.
2. Farm road, 300 meters at down-stream of Mayuan bridge, by the left side of Luchangko
canal, was constructed as park, and programmed with green trees for walking path and leisure
occasion so as to improve the environment of the village.
Photos