Based on two long-term, hourly (10:30–11:30 and 13:10–14:10) meteorological over-lake observations and data from Shenxian meteorological station, nearby Dongping Lake, the Penman-Monteith equation and reference evaporation ratio algorithm were used to calculate lake evaporation in Dongping Lake, China, from 2003 to 2010. The variation trend of evaporation of Dongping Lake was analyzed, and the influences that caused changes in lake evaporation were also discussed. The results show that (1) the total annual evaporation in Dongping Lake increased at 18.24？mm/a during 2003–2010. The major climatic factors accounting for this increase are the rising net radiation and the rising air temperature; (2) the total annual evaporation in a particular hour (13:10–14:10) in Dongping Lake increased at 4.55？mm/a during 2003–2010—the major climate factors that accounted for this increase are rising net radiation, followed by air temperature, wind velocity, and air humidity; (3) against the background of global warming, the climate of Dongping Lake tended to be dry during 2003–2010; the largest contribution to this comes from air temperature, followed by wind velocity and relative humidity; and (4) the monthly evaporation in Dongping Lake has seasonal variability. 1. Introduction Lakes and reservoirs store valuable fresh water and make them available for use in domestic, industrial, irrigation, hydropower, wetlands, and environmental applications [1]. The availability of fresh water stored in lakes and reservoirs is closely tied to variations in climate and human activities [2]. Evaporation is a key component in the water and energy cycles of lakes and reservoirs [2, 3]. In most situations, lake evaporation represents major water loss. Therefore, information on lake evaporation is essential for the water management of lakes and reservoirs. Climate variability affects lake evaporation, and in turn, evaporation also has an effect on the local climate [2, 4]. Some studies stated that lake evaporation can be considered to be a basic type of reference data for studies on land evaporation, climate changes, and water cycles [4]. The causes of lake evaporation changes have been extensively studied. For instance, hydrological models were used to calculate the water surface evaporations of many endorheic lakes and closed lakes, and how the regional climate changes affect the lake evaporation was analyzed [5, 6]. A Penman equation and CRLE (complementary relationship lake evaporation) model were used to calculate the evaporation of Ziway Lake in Africa, and how the air temperature
References
[1]
Z. Duan and W. G. M. Bastiaanssen, “Estimating water volume variations in lakes and reservoirs from four operational satellite altimetry databases and satellite imagery data,” Remote Sensing of Environment, vol. 134, pp. 403–416, 2013.
[2]
J. D. Lenters, T. K. Kratz, and C. J. Bowser, “Effects of climate variability on lake evaporation: results from a long-term energy budget study of Sparkling Lake, Northern Wisconsin (USA),” Journal of Hydrology, vol. 308, no. 1–4, pp. 168–195, 2005.
[3]
F. I. Morton, “Operational estimates of areal evapotranspiration and their significance to the science and practice of hydrology,” Journal of Hydrology, vol. 66, no. 1–4, pp. 1–76, 1983.
[4]
C. Y. Xu and V. P. Singh, “Evaluation of three complementary relationship evapotranspiration models by water balance approach to estimate actual regional evapotranspiration in different climatic regions,” Journal of Hydrology, vol. 308, no. 1–4, pp. 105–121, 2005.
[5]
I. M. Mason, M. A. J. Guzkowska, C. G. Rapley, et al., “The response of lake levels and areas to climatic change,” Climatic Change, vol. 27, no. 2, pp. 161–197, 1994.
[6]
C. Vallet-Coulomb, D. Legesse, F. Gasse, Y. Travi, and T. Chernet, “Lake evaporation estimates in tropical Africa (Lake Ziway, Ethiopia),” Journal of Hydrology, vol. 245, no. 1–4, pp. 1–18, 2001.
[7]
L. P. Zhu, M. P. Xie, and Y. H. Wu, “Quantitative analysis of lake area variations and the influence factors from 1971 to 2004 in the Nam Co Basin of the Tibetan Plateau,” Chinese Science Bulletin, vol. 55, no. 13, pp. 1294–1303, 2010.
[8]
R. J. Granger and D. M. Gray, “Evaporation from natural nonsaturated surfaces,” Journal of Hydrology, vol. 111, no. 1–4, pp. 21–29, 1989.
[9]
D. M. Kahler and W. Brutsaert, “Complementary relationship between daily evaporation in the environment and pan evaporation,” Water Resources Research, vol. 42, no. 5, pp. 1–9, 2006.
[10]
P. D. Blanken, W. R. Rouse, A. D. Culf et al., “Eddy covariance measurements of evaporation from Great Slave Lake, Northwest Territories, Canada,” Water Resources Research, vol. 36, no. 4, pp. 1069–1077, 2000.
[11]
J. Q. Keijman, “The estimation of the energy balance of a lake from simple weather data,” Boundary-Layer Meteorology, vol. 7, no. 3, pp. 399–407, 1974.
[12]
S. Swenson and J. Wahr, “Monitoring the water balance of Lake Victoria, East Africa, from space,” Journal of Hydrology, vol. 370, no. 1–4, pp. 163–176, 2009.
[13]
T. C. Winter, D. C. Buso, D. O. Rosenberry, G. E. Likens, A. M. Sturrock Jr., and D. P. Mau, “Evaporation determined by the energy-budget method for Mirror Lake, New Hampshire,” Limnology and Oceanography, vol. 48, no. 3, pp. 995–1009, 2003.
[14]
H. L. Penman, “Natural evaporation from open water, bare soil, and grass,” Proceedings of the Royal Society of London A, vol. 193, no. 1032, pp. 120–145, 1948.
[15]
J. L. Monteith, “Evaporation and environment,” in Symposium of the Society for Experimental Biology, the State and Movement of？？Water in Living Organisms, G. E. Fogg, Ed., vol. 19, 4, pp. 205–234, 1965.
[16]
C. P. Jacovides and H. Kontoyiannis, “Statistical procedures for the evaluation of evapotranspiration computing models,” Agricultural Water Management, vol. 27, no. 3-4, pp. 365–371, 1995.
[17]
R. H. Zhang, X. M. Sun, W. Wang, et al., “An operational two-layer remote sensing model to estimate surface flux in regional scale: physical background,” Science in China D, vol. 48, no. 1, pp. 225–244, 2005.
[18]
R. G. Allen, L. S. Pereira, D. Rtes, and M. Smith, Crop evapotranspiration—Guidelines for computing crop water requirements—FAO Irrigation and drainage paper 56. UN-FAO, Rome, Italy, 1998, http://www.fao.org/docrep/X0490E/x0490e00.htm.
[19]
B. J. Choudhury and S. B. Idso, “An empirical model for stomatal resistance of field-grown wheat,” Agricultural and Forest Meteorology, vol. 36, no. 1, pp. 65–82, 1985.
[20]
J. A. Goff and S. Gratch, “Low-pressure properties of water from-160 to 212 F,” Transactions of the American Society of Heating and Ventilating Engineers, vol. 51, pp. 125–164, 1946.
[21]
G. E. Likens and N. M. Johnson, “Measurement and analysis of the annual heat budget for the sediments in two Wisconsin lakes,” Limnology and Oceanography, vol. 14, no. 1, pp. 115–135, 1969.
[22]
W. Brutsaert and M. Sugita, “Application of self-preservation in the diurnal evolution of the surface energy budget to determine daily evaporation,” Journal of Geophysical Research, vol. 97, no. 17, pp. 18377–18382, 1992.
[23]
R. G. Allen, W. O. Pruitt, J. L. Wright et al., “A recommendation on standardized surface resistance for hourly calculation of reference ETo by the FAO56 Penman-Monteith method,” Agricultural Water Management, vol. 81, no. 1-2, pp. 1–22, 2006.
[24]
C. W. Thornthwaite, “An approach toward a rational classification of climate,” Geographical Review, vol. 38, no. 1, pp. 55–94, 1948.
[25]
W. Brutsaert, Hydrology: An Introduction, Cambridge University Press, 2005.
[26]
R. G. Allen, “Evaporation modeling: potential,” in Encyclopedia of Hydrological Sciences, John Wiley & Sons, New York, NY, USA, 2006.
[27]
H. Li, Z. Jiang, and Q. Yang, “Association of North Atlantic Oscillations with Aksu River runoff in China,” Journal of Geographical Sciences, vol. 19, no. 1, pp. 12–24, 2009.
[28]
S. H. Zhang, S. Liu, X. Mo, et al., “Assessing the impact of climate change on reference evapotranspiration in Aksu River Basin,” Acta Geographica Sinica, vol. 65, no. 11, pp. 1363–1370, 2010 (Chinese).
[29]
R. T. Wetherald and S. Manabe, “Cloud cover and climate sensitivity,” Journal of the Atmospheric Sciences, vol. 37, no. 7, pp. 1485–1510, 1980.
[30]
Y. Shi and S. Liu, “Estimation on the response of glaciers in China to the global warming in the 21st century,” Chinese Science Bulletin, vol. 45, no. 7, pp. 668–672, 2000.
