Detecting the probable impact of climate change responses on hydrological components is most important for understanding such changes on water resources. The impact of climate change on virtual parameters of water was assessed through hydrological modeling of the Wunna, Mahanadi (Middle), and Bharathpuzha watersheds. In this article, future hydrological component responses under two Representative Concentration Pathway (RCP) 4.5 and 8.5 scenarios were considered for investigating the runoff, sediment, and water storage components. RegCM4 CSIRO-Mk3.6.0 CORDEX South Asia of RCM model was used which is specially downscaled for the Asian region by IITM-India. Delta change method was adopted to remove bias correction in RCM data. Hydrological simulation for current and future periods was performed by GIS interfaced Soil Water and Assessment Tool (SWAT) model. The surface runoff of Wunna and Bharathpuzha watersheds and the yield of sediment are expected to increase further under RCP8.5 than RCP4.5 and in contrast to Mahanadi watershed. Both blue water storage (BW) and green water storage (GWS) of Wunna watershed are expected to decline under RCP4.5, and rise under RCP8.5 scenario. Both BW and GWS of Bharathpuzha are expected to increase in the future except in western region under RCP4.5 scenario. BW of Mahanadi is expected to increase in the future. However, GWS will decrease in some of the sub-basins. The model-generated results will be helpful for future water resources planning and development.

对于了解气候变化对水资源的影响而言，发现气候变化对水文要素的可能影响至关重要。通过对Wunna，Mahanadi（中部）和Bharathpuzha流域的水文模拟，评估了气候变化对水的虚拟​​参数的影响。在本文中，考虑了两种代表性浓度途径（RCP）4.5和8.5情景下未来的水文要素响应，以研究径流，沉积物和蓄水要素。使用RegCM4 CSIRO-Mk3.6.0 CORDEX RCM模型的南亚地区，该区域由IITM-印度专门针对亚洲地区进行了缩小。采用Delta变化法去除RCM数据中的偏差校正。通过GIS接口的土壤水和评估工具（SWAT）模型进行了当前和未来时期的水文模拟。在RCP8.5下，Wunna和Bharathpuzha流域的地表径流和沉积物的产量预计将比RCP4.5进一步增加，与Mahanadi流域相反。在RCP4.5下，Wunna流域的蓝色水存储量（BW）和绿色水存储量（GWS）预计会下降，而在RCP8.5情况下则会上升。预期未来Bharathpuzha的BW和GWS都会增加，除了在RCP4.5情景下的西部地区以外。Mahanadi的BW预计将在未来增加。但是，某些子流域的GWS将减少。模型产生的结果将有助于未来的水资源规划和开发。在RCP8.5下，Wunna和Bharathpuzha流域的地表径流和沉积物的产量预计将比RCP4.5进一步增加，与Mahanadi流域相反。在RCP4.5下，Wunna流域的蓝色水存储量（BW）和绿色水存储量（GWS）预计会下降，而在RCP8.5情况下则会上升。预计未来Bharathpuzha的BW和GWS都将增加，但在RCP4.5情景下，西部地区除外。Mahanadi的BW预计将在未来增加。但是，某些子流域的GWS将减少。模型产生的结果将有助于未来的水资源规划和开发。在RCP8.5下，Wunna和Bharathpuzha流域的地表径流和沉积物的产量预计将比RCP4.5进一步增加，与Mahanadi流域相反。在RCP4.5下，Wunna流域的蓝色水存储（BW）和绿色水存储（GWS）预计将下降，而在RCP8.5情况下则上升。预期未来Bharathpuzha的BW和GWS都会增加，除了在RCP4.5情景下的西部地区以外。Mahanadi的BW预计将在未来增加。但是，某些子流域的GWS将减少。模型产生的结果将有助于未来的水资源规划和开发。在RCP4.5下，Wunna流域的蓝色水存储量（BW）和绿色水存储量（GWS）预计会下降，而在RCP8.5情况下则会上升。预期未来Bharathpuzha的BW和GWS都会增加，除了在RCP4.5情景下的西部地区以外。Mahanadi的BW预计将在未来增加。但是，某些子流域的GWS将减少。模型产生的结果将有助于未来的水资源规划和开发。在RCP4.5下，Wunna流域的蓝色水存储量（BW）和绿色水存储量（GWS）预计会下降，而在RCP8.5情况下则会上升。预期未来Bharathpuzha的BW和GWS都会增加，除了在RCP4.5情景下的西部地区以外。Mahanadi的BW有望在未来增加。但是，某些子流域的GWS将减少。模型产生的结果将有助于未来的水资源规划和开发。