Determination of the best temperature based method of evaporation estimation from the Karde reservoir in order to investigate the effect of reducing useful volume of the reservoir on evaporation from the lake surface

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MOSAEDI A.; YAZDANPARAST M.; MAHMUDY GHARAIE M.H.; KHODASHENAS S.R.; GOLKARIAN A.

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Journal: Journal of Water and Soil Conservation Year:2019 | Volume:26 | Issue:2 Page(s): 29-51

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Title

Determination of the best temperature based method of evaporation estimation from the Karde reservoir in order to investigate the effect of reducing useful volume of the reservoir on evaporation from the lake surface

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Keywords

Error evaluation criteriaQ2

Evaporation EstimationQ2

Kardeh damQ1

SedimentationQ2

Thermal methodsQ1

Abstract

Background and Objectives: Nowadays water scarcity has become one of the most important problems in many communities. Construction of dams and water storage to provide part of the required water and flood control is one of the ways to coexist with problems caused by water scarcity, flood or drought. Evaporation of lakes, reservoirs and ponds surfaces in the optimal utilization of water resources. Evaporation rates from surface waters are usually higher in wet areas, especially in areas where the horizontal flow of heat transfer is significant. On the other hand, the amount of Sedimentation in the reservoir of the dam increases over time. One of the problems of Sedimentation is changes in the geometry of the reservoir and the increase of the dam lake level for different amounts storage volume. This, in turn, leads to increased evaporation due to an increase in the levels of Lake dam. Therefore, the main objective of this study is to estimate the evaporation from the lake level of the Kardeh dam and to select the most suitable method for estimating evaporation from the lake surface and also to determine the effect of Sedimentation on evaporation from the reservoir level. Materials and Methods: In order to estimate the rate of evaporation from the Kardeh reservoir, first by using 6 thermal evaporation method including Jensen-Haise, Hamon, Estefen-Stewart, Papadakis, Abtew and Turc the evaporation rate was estimated in monthly, quarterly and annual scales. Then, these values were compared with data from pan evaporation, using nine indicators evaluate errors. Also, to determine the impact of Sedimentation on the evaporation of the lake of this dam, reservoir levels per amount of storage volume (5 scenario includes volumes 5, 10, 15, 20 and 25 million cubic meters) was determined according to the Hydrographs that was conducted in the years 1375-1376, 1382-1383 and 1387-1388. Results: The results show that Jensen-Haise method, is the best thermal method of estimating evaporation in terms of lack of pan evaporation measured data. It should be noted that in order to estimate the evaporation in monthly or seasonally scale, Papadakis method for winter and Turc method for the summer season will be appropriate methods. Also, by reducing profitable volume due to Sedimentation, reservoir lake level (per amount of stored stream) increases. So that this increased level by increasing the storage volume from 5 million cubic meters to 25 million cubic meters, evaporation rate increase to three times the first case. In other words, it can be stated that with 5 times the volume stored in the reservoir (storage volume change from 5 to 25 million cubic meters) and also increase Sedimentation the volume of surface evaporation 3 times increases. Studies show that all methods whether overestimated or underestimated, show increasing evaporation rate by changing the storage volume during the mentioned years due to the increase of the level of the lake of Kardeh reservoir. Conclusion: Jensen-Haise due to the closest data with pan evaporation data and earn the most points from the total score of 9 evaluation index error in estimating evaporation, were selected as the best thermal method for estimating evaporation in terms of the lack of pan evaporation measured data in the region among the six studied methods. Hamon estimation of evaporation method is the most underestimated and Etefen-Stewart method is the most overestimated method. Increasing Sedimentation in the reservoir improves the water level to higher level in the reservoir, which, in view of the open geometry of the reservoir of Kardeh dam, will lead to an increase in the lake level and ultimately increase the evaporation rate from the reservoir's dam.

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APA: Copy

MOSAEDI, A., YAZDANPARAST, M., MAHMUDY GHARAIE, M.H., KHODASHENAS, S.R., & GOLKARIAN, A.. (2019). Determination of the best temperature based method of evaporation estimation from the Karde reservoir in order to investigate the effect of reducing useful volume of the reservoir on evaporation from the lake surface. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(2 ), 29-51. SID. https://sid.ir/paper/156216/en

Vancouver: Copy

MOSAEDI A., YAZDANPARAST M., MAHMUDY GHARAIE M.H., KHODASHENAS S.R., GOLKARIAN A.. Determination of the best temperature based method of evaporation estimation from the Karde reservoir in order to investigate the effect of reducing useful volume of the reservoir on evaporation from the lake surface. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;26(2 ):29-51. Available from: https://sid.ir/paper/156216/en

IEEE: Copy

A. MOSAEDI, M. YAZDANPARAST, M.H. MAHMUDY GHARAIE, S.R. KHODASHENAS, and A. GOLKARIAN, “Determination of the best temperature based method of evaporation estimation from the Karde reservoir in order to investigate the effect of reducing useful volume of the reservoir on evaporation from the lake surface,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 2 , pp. 29–51, 2019, [Online]. Available: https://sid.ir/paper/156216/en

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