Abstract
The ecological water requirement of forests is defined as the water resources used to maintain and improve the natural balance of forest ecosystems, which can be expressed by evapotranspiration of trees during the growing season. The relationship of evapotranspiration and soil moisture of forestland with tree growth showed that, if the soil moisture was above the temporary wilting point or the point of growth retardation, the growth of trees can, respectively, be basically or normally sustained. Therefore, they can be taken as the minimum and the suitable ecological water requirements of the forest. These points can be estimated by introducing the soil factor (K s) and tree species factor (K t) to potential evapotranspiration with the Penman formula. With geographic information system (GIS), the ecological water requirement for forests in the Jinghe watershed, western China was estimated. The results revealed that the minimum and suitable ecological water requirements of the forests in the Jinghe watershed were approximately 204×107 and 340×107 m3, respectively.
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References
Chen L.-H. and Wang L.-X., Classification of ecological water use and quota determination of ecological water use of forest covers in Beijing, Res. Soil Water Conserv., 2001, 8(4): 161–164 (in Chinese)
Wang F., Liang R.-J., Yang X.-L. and Chen M.-J., A study of ecological water requirements in Northwest China I: theoretical analysis, J. Nat. Resour., 2002, 17(1): 1–8 (in Chinese)
Wang F., Wang H., Chen M.-J., Wang Y. and Tang K.-W., A study of ecological water requirements in Northwest China II: application of remote sensing and GIS, J. Nat. Resour., 2002, 17(2): 129–137 (in Chinese)
Wang L.-X., Vegetative eco-environmental construction and water use of eco-environment, Res. Soil Water Conserv., 2000, 7(3): 5–7 (in Chinese)
Zhang Y. and Yang Z.-F., Minimum ecological water requirement of forestland in Huang-Huai-Hai area, J. Soil Water Conserv., 2002, 16(2): 72–75 (in Chinese)
Zuo Q.-T., Study on vegetation ecological for water resources in arid and semi-arid region, J. Soil Water Conserv., 2002, 16(3): 114–117 (in Chinese)
Wei T. and Zhu J.-Z., Feature of water supply and consumption and productivity of stand in loess region, J. Soil Erosion Soil Water Conserv., 1999, 5(4): 45–51 (in Chinese)
Yu X.-X. and Chen L. H., A study on water balance of protective forest ecosystem in loess area, Acta Ecol. Sin., 1996, 16(3): 238–245 (in Chinese)
Larcher W., Physiological Plant Ecology (3rd edn.), Berlin Springer, 1995
Nielsen E.-T. and Orcutt D.-M., Physiology of Plants Under Stress: Abiotic Factors, New York: Wiley, 1998
Li Y.-S., Feature of soil water cycle in Loess region and its effect on land water cycle, Acta Ecol. Sin., 1983, 3(2): 91–101 (in Chinese)
Yu X.-X., Zhang J.-J. and Zhu J.-Z., Analysis and evaluation of soil water conditions of protective forest ecosystem in loess area, Sci. Silvae Sin., 1996, 32(4): 289–296 (in Chinese)
Penman H.-L., Natural evaporation from open water, bare soil and grass, Proceeding of Royal Society Annually, 1948, 193: 454–465
Jensen M.-E., Consumptive Use of Water and Irrigation Water Requirements, New York: American Society of Civil Engineers, 1973
Wang M.-B. and Li H.-J., Research on Hydro-Ecology of Artificial Forests in Loess Plateau, Beijing: China Forestry Publishing House, 2001 (in Chinese)
Yang W.-Z. and Shao M.-A., Research on Soil Water in Loess Plateau, Beijing: Science Press, 2000 (in Chinese)
Guo Z.-S., Research on effective cover rate and it’s determining method for soil and water conservation forest, J. Soil Erosion Soil Water Conserv., 1996, 2(2): 67–72 (in Chinese)
Wu Q.-X. and Zhao H.-Y., Hydro-ecological effects of forest and suitable index of vegetation coverage, B. Soil Water Conserv., 2001, 15(4): 13–15 (in Chinese)
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Translated from Journal of Soil and Water Conservation, 2004, 18(6) (in Chinese)
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He, Y., Min, Q., Li, W. et al. Estimated Forest Ecological Water Requirements in the Jinghe Watershed—Theory and Case Study. Front. Forest. China 1, 43–47 (2006). https://doi.org/10.1007/s11461-005-0011-3
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DOI: https://doi.org/10.1007/s11461-005-0011-3