Evaluation and spatial downscaling of CRU TS precipitation data in the Philippines

2018 ◽  
Vol 4 (3) ◽  
pp. 891-898 ◽  
Author(s):  
Arnold R. Salvacion ◽  
Damasa B. Magcale-Macandog ◽  
Pompe C. Sta. Cruz ◽  
Ronaldo B. Saludes ◽  
Ireneo B. Pangga ◽  
...  
Keyword(s):  
The Philippines ◽  
Precipitation Data ◽  
Spatial Downscaling

scholarly journals Watershed Modelling of the Mindanao River Basin in the Philippines Using the SWAT for Water Resource Management

2020 ◽  
Vol 6 (4) ◽  
pp. 626-648 ◽  
Author(s):  
Ismail Adal Guiamel ◽  
Han Soo Lee
Keyword(s):  
Resource Management ◽  
Data Quality ◽  
River Basin ◽  
Water Resource ◽  
River Discharge ◽  
Water Resource Management ◽  
The Philippines ◽  
Water Withdrawal ◽  
Precipitation Data ◽  
Average Growth

This study aims to simulate the watershed of the Mindanao River Basin (MRB) to enhance water resource management for potential hydropower applications to meet the power demand in Mindanao with an average growth of 3.8% annually. The soil and water assessment tool (SWAT) model was used with inputs for geospatial datasets and weather records at four meteorological stations from DOST-PAGASA. To overcome the lack of precipitation data in the MRB, the precipitation records were investigated by comparing the records with the global gridded precipitation datasets from the NCDC-CPC and the GPCC. Then, the SWAT simulated discharges with the three precipitation data were calibrated with river discharge records at three stations in the Nituan, Libungan and Pulangi rivers. Due to limited records for the river discharges, the model results were, then, validated using the proxy basin principle along the same rivers in the Nituan, Libungan, and Pulangi areas. The R2 values from the validation are 0.61, 0.50 and 0.33, respectively, with the DOST-PAGASA precipitation; 0.64, 0.46 and 0.40, respectively, with the NCDC-CPC precipitation; and 0.57, 0.48 and 0.21, respectively, with the GPCC precipitation. The relatively low model performances in Libungan and Pulangi rivers are mainly due to the lack of datasets on the dam and water withdrawal in the MRB. Therefore, this study also addresses the issue of data quality for precipitation and data scarcity for river discharge, dam, and water withdrawal for water resource management in the MRB and show how to overcome the data quality and scarcity.

scholarly journals Spatial Downscaling of Remote Sensing Precipitation Data in the Beijing-Tianjin-Hebei Region

2021 ◽  
Vol 09 (06) ◽  
pp. 191-202
Author(s):  
Nuan Wang ◽  
Jie Yu ◽  
Lin Zhu ◽  
Yanbing Wang ◽  
Zhengyang He
Keyword(s):  
Remote Sensing ◽  
Precipitation Data ◽  
Spatial Downscaling

Spatial downscaling of TRMM-based precipitation data using vegetative response in Xinjiang, China

2016 ◽  
Vol 37 (10) ◽  
pp. 3895-3909 ◽  
Author(s):  
Qiang Zhang ◽  
Peijun Shi ◽  
Vijay P. Singh ◽  
Keke Fan ◽  
Jiajun Huang
Keyword(s):  
Precipitation Data ◽  
Spatial Downscaling

scholarly journals Spatial Downscaling of Satellite Precipitation Data in Humid Tropics Using a Site-Specific Seasonal Coefficient

Water ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 409 ◽  
Author(s):  
Mohd. Mahmud ◽  
Mazlan Hashim ◽  
Hiroshi Matsuyama ◽  
Shinya Numata ◽  
Tetsuro Hosaka
Keyword(s):  
Humid Tropics ◽  
Precipitation Data ◽  
Site Specific ◽  
Satellite Precipitation ◽  
A Site ◽  
Spatial Downscaling

scholarly journals Downscaling of Open Coarse Precipitation Data through Spatial and Statistical Analysis, Integrating NDVI, NDWI, Elevation, and Distance from Sea

2017 ◽  
Vol 2017 ◽  
pp. 1-20 ◽  
Author(s):  
Hicham Ezzine ◽  
Ahmed Bouziane ◽  
Driss Ouazar ◽  
Moulay Driss Hasnaoui
Keyword(s):  
Statistical Analysis ◽  
Coastal Area ◽  
Mediterranean Area ◽  
The Other ◽  
Precipitation Data ◽  
Best Approximations ◽  
Correlation Models ◽  
Variable Distance ◽  
Coarse Precipitation ◽  
Spatial Downscaling

This study aims to improve the statistical spatial downscaling of coarse precipitation (TRMM 3B43 product) and also to explore its limitations in the Mediterranean area. It was carried out in Morocco and was based on an open dataset including four predictors (NDVI, NDWI, DEM, and distance from sea) that explain TRMM 3B43 product. For this purpose, four groups of models were established based on different combinations of the four predictors, in order to compare from one side NDVI and NDWI based models and the other side stepwise with multiple regression. The models that have given rise to the best approximations and best fits were used to downscale TRMM 3B43 product. The resulting downscaled and calibrated precipitations were validated by independent RGS. Aside from that, the limitations of the proposed approach were assessed in five bioclimatic stages. Furthermore, the influence of the sea was analyzed in five classes of distance. The findings showed that the models built using NDVI and NDWI have a high correlation and therefore can be used to downscale precipitation. The integration of elevation and distance improved the correlation models. According to R2, RMSE, bias, and MAE, the study revealed that there is a great agreement between downscaled precipitations and RGS measurements. In addition, the analysis showed that the contribution of the variable (distance from sea) is evident around the coastal area and decreases progressively. Likewise, the study demonstrated that the approach performs well in humid and arid bioclimatic stages compared to others.

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