In: Journal of Hydrology and Hydromechanics, vol. 66, no. 1
Shengqi Jian - Xueli Zhang - Dong Li - Deng Wang - Zening Wu - Caihong Hu
Detaily:
Rok, strany: 2018, 79 - 86
O článku:
The experiments of stemflow of two semiarid shrubs (Caragana korshinskii and Hippophae rhamnoides) and
its effect on soil water enhancement were conducted from 1st May to 30th September of 2009–2013 in the Chinese Loess
Plateau. Stemflow values in C. korshinskii and H. rhamnoides averaged 6.7% and 2.4% of total rainfall. The rainfall
threshold for stemflow generation was 0.5 and 2.5 mm for C. korshinskii and H. rhamnoides. When rainfall was less than
17.0 mm, the funnelling ratios were highly variable, however, stable funnelling ratios were found for rainfall greater than
17.0 mm for C. korshinskii. The funnelling ratios of H. rhamnoides first increased until a threshold value of 10.0 mm and
then the funnelling ratios begin stabilize. The wetting front depths in the area around stem was 1.4–6.7 and 1.3–2.9 times
deeper than area outside the canopy for C. korshinskii and H. rhamnoides. Soil moisture at soil depth 0–200 cm was
25.6% and 23.4% higher in soil around stem than that outside canopy for C. korshinskii and H. rhamnoides. The wetting
front advanced to depths of 120 and 100 cm in the area around stem and to depths of 50 cm in the area outside the canopy
for C. korshinskii and H. rhamnoides suggested that more rain water can be conserved into the deep soil layers
through shrub stemflow. Soil moisture was enhanced in the area outside the shrub canopy, only when rainfall depth is >
4.7 and 5.1 mm, which is an effective rainfall for the area for C. korshinskii and H. rhamnoides. While for the area
around stem of C. korshinskii and H. rhamnoides, the corresponding threshold values are 3.2 and 4.3 mm. These results
confirmed that stemflow has a positive effect on soil moisture balance of the root zone and the enhancement in soil moisture
of deeper soil layers.
Ako citovať:
ISO 690:
Jian, S., Zhang, X., Li, D., Wang, D., Wu, Z., Hu, C. 2018. The effects of stemflow on redistributing precipitation and infiltration
around shrubs. In Journal of Hydrology and Hydromechanics, vol. 66, no.1, pp. 79-86. 0042-790X (until 2019) .
APA:
Jian, S., Zhang, X., Li, D., Wang, D., Wu, Z., Hu, C. (2018). The effects of stemflow on redistributing precipitation and infiltration
around shrubs. Journal of Hydrology and Hydromechanics, 66(1), 79-86. 0042-790X (until 2019) .