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Çѱ¹¼öÀÚ¿øÇÐȸ / v.11, no.2, 1978³â, pp.54-61
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ºñÁ¤»ó ¿ùÀ¯·® ½Ã°è¿ÀÇ ÇØ¼®°ú ¿¹Ãø
( Analysis and Forecast of Non-Stationary Monthly Steam Flow ) |
| ÀÌÀçÇü;¼±¿ìÁßÈ£; ¼¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú Á¶±³;¼¿ï´ëÇб³ °ø°ú´ëÇÐ;
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| ºñ±³Àû Áֱ⼺ÀÌ °ÇÏ°í °æÇ⼺ÀÌ Á¸ÀçÇÏ´Â À¯·®½Ã°è¿¿¡ ÀÖ¾î¼ ¿¹Ãø ¹× ¸ðÀǹ߻ýÀ» À§ÇÑ ¸ðÇü°³¹ßÀÌ ½ÃµµµÇ¾ú´Ù. ¿ø½Ã°è¿·ÎºÎÅÍ ±¸ÇÑ Â÷ºÐ½Ã°è¿(Diffe renced time series)ÀÌ Á¤»ó°øºÐ»êÀ» °®´Â´Ù´Â °¡Á¤ÇÏ¿© ¸ðÇüÀÇ °íÁ¤È(Model Intentification)°¡ ½Ç½ÃµÇ¾úÀ¸¸ç, Á¤»ó°¡Á¤À» Á¤´çÈÇϱâ À§ÇØ ÀÜÂ÷(Residual)ÀÇ Åë°èÀû ¼ºÁúÀ» °ËÅäÇÏ¿´´Ù. ¶ÇÇÑ, µ¿Á¤µÈ ¸ðÇüÀÇ ¿¹Ãø Á¤µµ¸¦ ³ëÀ̱â À§ÇÏ¿© ¿¹Ãø¿ÀÂ÷ÀÇ ºÐ»êÀÌ ÃÖ¼Ò°¡ µÇµµ·Ï Ãß°èÀû Á¦¾î(Stochastic Control)µÈ ¸ðÇüÀ» ¿¹Ãø¿¡ »ç¿ëÇÏ¿´´Ù. Çѱ¹ÁÖ¿äÇÏõÀ¯¿ªÀÇ À¯·®ÀÚ·á¿¡ ´ëÇÑ ¸ðÇüÀÇ °íÁ¤°ú ¿¹Ãø°á°ú·ÎºÎÅÍ, Â÷ºÐ¿¬»êÀÚ(Difference operator)´Â °æÇâ°ú Áֱ⸦ Á¦°ÅÇϴµ¥ ÁÁÀº ¹æ¹ýÀÌ µÊÀÌ ÆÇ´ÜµÇ¾ú´Ù. |
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| An attemption of synthesizing and forecasting of monthly river flow has been made by employing a linear stochastic difference equation model. As one of the linear stochestic difference equation model, an ARIMA Type is tested to find the suitability of the model to the monthly river flows. On the assumption of the stationary covariacne of differenced monthly river flows the model is identrfield and is evaluated so that the residuale have the minimum variance. Finally a test is performed to finld the residerals beings White noise. Monthly river flows at six stations in Han River Basin are applied for case studies. It was found that the difference operator is a good measure of forecasting the monthly river flow. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.11, no.2, 1978³â, pp.54-61
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO197811920089415)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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