Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12517-018-3580-9 |
Examining the rainfall-topography relationship using non-stationary modelling technique in semi-arid Aseer region, Saudi Arabia | |
Mallick, Javed1; Singh, Ram Karan1; Khan, Roohul Abad1; Singh, Chander Kumar2; Ben Kahla, Nabil1; Warrag, Essam Ibrahim3; Islam, Saiful1; Rahman, Atiqur4 | |
通讯作者 | Mallick, Javed |
来源期刊 | ARABIAN JOURNAL OF GEOSCIENCES
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ISSN | 1866-7511 |
EISSN | 1866-7538 |
出版年 | 2018 |
卷号 | 11期号:9 |
英文摘要 | The mountainous region of Aseer, corresponding to the Afromontane phytogeographic region, is an eco-sensitive zone and has complex relationship between topography and rainfall. The region is located inland of the red sea escarpment edge in the west. Therefore, rainfall can occur during any month of the year in the mountain of the high Aseer region when moist air forces up the escarpment from the red sea. Monitoring the rainfall data and its topographical elevation variable in Aseer region is an essential requirement for feasible and accurate rainfall-based data for different applications, such as hydrological and ecological resource management in rugged terrain and remote areas. The relationship of elevation and rainfall are spatially non-stationary, non-linear, scale dependent, and often modelled by conventional regression models. Therefore, a local modelling technique, geographically weighted regression (GWR), was applied to deal with non-stationary, non-linear, scale-dependent problems. The GWR using topoclimatic data (elevation and rainfall) to analyse the cumulative rainfall data for rainy months (March to June) of the 4 years estimated from CHIRPS (Climate Hazards Group InfraRed Precipitation with Stations) product for Aseer region. The bandwidth (scale-size) of the Aseer region rainfall-elevation relationship has stabilised at round off 12 km. By selecting the suitable bandwidth, the spatial pattern of the rainfall-elevation relationship was significantly enhanced by using the GWR than the traditional ordinary least squares (OLS) regression model. GWR local modelling techniques estimated well in terms of accuracy, predictive power and decreased residual autocorrelation. Additionally, GWR assesses the significance of local statistic at each location and identified the location of spatial clusters with local regression coefficients significantly improved as compared with global OLS model, thereby highlighting local variations. Therefore, the GWR, local modelling approach managed to produce more accurate estimates by taking into account local characteristics. |
英文关键词 | Ordinary least squares (OLS) regression Geographically weighted regression Non-stationarity CHIRPS product Aseer region |
类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia ; India |
收录类别 | SCI-E |
WOS记录号 | WOS:000432106300031 |
WOS关键词 | GEOGRAPHICALLY-WEIGHTED REGRESSION ; MONTHLY PRECIPITATION ; ELEVATION DATA ; SOUTH-AMERICA ; SATELLITE ; VALIDATION ; VARIABILITY ; MOUNTAINS ; SCALE ; TRMM |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207713 |
作者单位 | 1.King Khalid Univ, Coll Engn, Dept Civil Engn, POB 394, Abha 61411, Saudi Arabia; 2.TERI Univ, Dept Energy & Environm, New Delhi, India; 3.King Khalid Univ, Coll Sci, Dept Biol, Abha, Saudi Arabia; 4.Jamia Millia Islamia, Fac Nat Sci, Urban Environm & Remote Sensing Div, New Delhi, India |
推荐引用方式 GB/T 7714 | Mallick, Javed,Singh, Ram Karan,Khan, Roohul Abad,et al. Examining the rainfall-topography relationship using non-stationary modelling technique in semi-arid Aseer region, Saudi Arabia[J],2018,11(9). |
APA | Mallick, Javed.,Singh, Ram Karan.,Khan, Roohul Abad.,Singh, Chander Kumar.,Ben Kahla, Nabil.,...&Rahman, Atiqur.(2018).Examining the rainfall-topography relationship using non-stationary modelling technique in semi-arid Aseer region, Saudi Arabia.ARABIAN JOURNAL OF GEOSCIENCES,11(9). |
MLA | Mallick, Javed,et al."Examining the rainfall-topography relationship using non-stationary modelling technique in semi-arid Aseer region, Saudi Arabia".ARABIAN JOURNAL OF GEOSCIENCES 11.9(2018). |
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