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| Author(s): | Parton, W. J.;
Lauenroth, W. K.;
Smith, F. M. |
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| Author Affiliation: | Natural Resource Ecol. Lab., Colorado State Univ., Fort Collins, CO 80523, USA |
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| Title: | Water loss from a shortgrass steppe |
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| Source: | Agricultural Meteorology. Vol. 24, No. 2, 1981, p. 97-109. |
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| Publishing Information: | Amsterdam |
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| Keywords: | TIC Keywords: Bouteloua gracilis; Canopy resistance; Artemisia frigida; Sphaeralcea coccinea; Bouteloua dactyloides; Evapotranspiration
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| Geographic Terms: | Colorado |
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| Abstract/Contents: | In 1972-5 daily and hourly water loss from a shortgrass steppe of mainly blue grama, Artemisia frigida, Sphaeralcea coccinea and Buchloe dactyloides in NE Colorado was determined with a weighing lysimeter. Daily potential evapotranspiration rates (PER) were also calculated, and canopy resistance was evaluated on an hourly basis for selected days. On a monthly basis, water loss was generally equal to the water input, while actual water loss was substantially lower than the PER. The daily water loss data show that water loss was approx. equal to the PER immediately after large precipitation events, then decreased very rapidly for 4 days after the event. Precipitation data show that large events () 15 mm/day) contributed most of the total precipitation/yr, with most of the water loss/yr from the system occurring 2-14 days immediately following the large precipitation events. The hourly water loss data show that when the soil was wet, water loss was maintained at the max. rate; however, as the soil dried out, the water loss rate fell below the potential rate during the middle of the day, with the rate falling below the potential rate at early morning hours with drier soils. The canopy resistance was fairly low (2-5 s/cm) when the soil was wet and did not change throughout the day; however, as the soil dried, the resistance increased throughout the day with the greatest increase observed on the driest soils. |
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| Language: | English |
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| References: | 16 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Parton, W. J., W. K. Lauenroth, and F. M. Smith. 1981. Water loss from a shortgrass steppe. Agric. Meteorol. 24(2):p. 97-109. |
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