ridm@nrct.go.th   ระบบคลังข้อมูลงานวิจัยไทย   รายการโปรดที่คุณเลือกไว้

Multisite rainfall downscaling and disaggregation in a tropical urban area

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Multisite rainfall downscaling and disaggregation in a tropical urban area
นักวิจัย : Qin, Xiaosheng , Lu, Yan
คำค้น : DRNTU::Engineering::Civil engineering::Water resources
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Lu, Y., & Qin, X. (2014). Multisite rainfall downscaling and disaggregation in a tropical urban area. Journal of Hydrology, 509, 55-65. , 0022-1694 , http://hdl.handle.net/10220/18959 , http://dx.doi.org/10.1016/j.jhydrol.2013.11.027
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of hydrology
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A systematic downscaling-disaggregation study was conducted over Singapore Island, with an aim to generate high spatial and temporal resolution rainfall data under future climate-change conditions. The study consisted of two major components. The first part was to perform an inter-comparison of various alternatives of downscaling and disaggregation methods based on observed data. This included (i) single-site generalized linear model (GLM) plus K-nearest neighbor (KNN) (S-G-K) vs. multisite GLM (M-G) for spatial downscaling, (ii) HYETOS vs. KNN for single-site disaggregation, and (iii) KNN vs. MuDRain (Multivariate Rainfall Disaggregation tool) for multisite disaggregation. The results revealed that, for multisite downscaling, M-G performs better than S-G-K in covering the observed data with a lower RMSE value; for single-site disaggregation, KNN could better keep the basic statistics (i.e. standard deviation, lag-1 autocorrelation and probability of wet hour) than HYETOS; for multisite disaggregation, MuDRain outperformed KNN in fitting interstation correlations. In the second part of the study, an integrated downscaling-disaggregation framework based on M-G, KNN, and MuDRain was used to generate hourly rainfall at multiple sites. The results indicated that the downscaled and disaggregated rainfall data based on multiple ensembles from HadCM3 for the period from 1980 to 2010 could well cover the observed mean rainfall amount and extreme data, and also reasonably keep the spatial correlations both at daily and hourly timescales. The framework was also used to project future rainfall conditions under HadCM3 SRES A2 and B2 scenarios. It was indicated that the annual rainfall amount could reduce up to 5% at the end of this century, but the rainfall of wet season and extreme hourly rainfall could notably increase.

บรรณานุกรม :
Qin, Xiaosheng , Lu, Yan . (2556). Multisite rainfall downscaling and disaggregation in a tropical urban area.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Qin, Xiaosheng , Lu, Yan . 2556. "Multisite rainfall downscaling and disaggregation in a tropical urban area".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Qin, Xiaosheng , Lu, Yan . "Multisite rainfall downscaling and disaggregation in a tropical urban area."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Qin, Xiaosheng , Lu, Yan . Multisite rainfall downscaling and disaggregation in a tropical urban area. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.