A Hydrological Tank Model Assessing Historical Runoff Variation in the Hieu River Basin

Abstract

The Hieu River is the largest tributary on the left bank of the Ca River, which is one of the large basins in north-central Vietnam. Here, we use cumulative anomaly tests and Pettitt tests to ascertain the turning points in annual rainfall and discharge during the time period 1962-2014. The results of our statistical analysis reveal a breaking point in 1982 for the rainfall time series and in the late 1970s and late 1990s for the discharge time series. A storage-type hydrological model is used to determine runoff processes for different periods corresponding to detecting points of rainfall and discharge. The results of our model simulation confirm that a two-tank model with monthly input data is the most appropriate tank model for the Hieu River. The difference between the hydrographs improved when we used a rain factor function. A comparison between the observed and calculated runoff revealed a drastic decrease between 1999 and 2014. The rate of discharge loss in the Lower Basin was approximately six times higher than that in the Upper Basin, a finding potentially due to reservoir construction and intensive water use for agricultural and residential purposes.

Watershed hydrological modelling in data scarce regions; integrating ecohydrology and regionalization for the southern Caspian Sea basin, Iran

“…Even though applying some watershed signature metrics could be indicative, nonetheless the accuracy of the model in predicting low to normal flows and high flows can be visually interpreted. As such, the former (low to moderate flow) was successfully predicted but there is some noise in high flows needing to be further assessed (which is respectively in contrast and in compliance with the results of Phuong at el., 2018 and Jaiswal et al., 2020 ). The results are also in concordance with Sheikh Goodarzi et al.…”

“…Having reviewed the literature in terms of using the Tank model (either selected as the main or in combination with other forms to model the water balance of ecosystems), we reach to the below discussed conclusion. As researchers have always been seeking for the platforms that enable them to simulate the hydrological processes with less effort and more performance, many have adapted a series of lumped to distributed forms of Tank to advance the hydrologic predictions based on the local data availability and model flexibility ( Chen and Adams, 2006 ; Basri, 2013 ; Onyutha, 2016 ; Jabbarian Amiri et al., 2016 ; Suryoputro et al., 2017 ; Song et al., 2017 ; Sheikh Goodarzi et al., 2018 , 2020 ; Phuong et al., 2018 ; Jaiswal et al., 2020 ; Vasconcellos et al., 2020 ).…”

“…The results showed that the given series of hydrological processes in medium to large scale watersheds was satisfactorily projected whereas an unsatisfactory trial applied at small scale watersheds (below 15 k 2 ). Phuong at el (2018) have recruited the Tank model in combination with Cumulative Anomaly and Pettitt-test to address historic runoff variation in Vietnam. In their study, the two storage Tank successfully detected the discharge loss caused by intensive water usage and reservoir constructions in the study areas.…”

Establishing an early warning system for flash floods in Hoang Su Phi District, Ha Giang Province, Vietnam

“…Comparison between potential flash flood risk areas and flash flood areas from 2000 to 2017. The tank model was a model originally developed by M Sugawara of Japan in 1967 that comprises of 'several storage tanks arranged vertically in a series, representing a zonal structure of groundwater in the objective catchment'(Phuong HT et al, 2018).3 The SSARR or Streamflow Synthesis and Reservoir Regulation System model is a 'computerized watershed model plus a river and reservoir system model' developed 'to provide hydraulic simulations for system analyses for planning, design, and operation of water control works and for operational river forecasting'. For further information see: http://www.wmo.…”

Developing Interception and Root Uptake Systems in Conceptual Hydrological Modelling

“…The conceptual hydrological model developed is the tank model. The tank model has been extensively developed to analyse various cases of rainfall and discharge relationships (Basri, 2013;Chen et al, 2014;Ou et al, 2017;Phuong et al, 2018). In this study, the development of models was carried out to improve the ability of models in the management of forest and plantation land use.…”