Measurement of Evapotranspiration by Lysimeter

Evapotranspiration can be measured, at a site which also measures rainfall, by using a lysimeter which

gives additional information on soil water balance.

¢Decide on the location (choose a level piece of ground) near but not too close to the rain gauge.

¢Cut and remove the turf and put Tank & receiver

¢There should be a slight fall between tank and receiver to allow drainage.

References

1: PERKINS, D. F. (1996).The lysimeter: A robust alternative apparatus to the Piche evaporimeter. Bulletin, Climatological Observers Link., 317,

42-45.

2: PENMAN, H. L. (1948). Natural evaporation from open water, bare soil and grass. Proc. Roy. Soc. (London) A., 193, 120-145.

3: THORNTHWAITE, C. W. (1948). Geograph. Rev., 38, 56.

4: GREEN, F. H. W. (1960). A technique for measuring potential evaporation and some of its applications. Water & Water Eng., December, 3-8.

5: PERKINS, D. F. (2001). Lysimeter PE. Bulletin, Climatological Observers Link., 371, 41.