Development of water and energy Budget-based Rainfall-Runoff-Inundation model (WEB-RRI) and its verification in the Kalu and Mundeni River Basins, Sri Lanka

2019 ◽  
Vol 579 ◽  
pp. 124163 ◽  
Author(s):  
Mohamed Rasmy ◽  
Takahiro Sayama ◽  
Toshio Koike
Keyword(s):  
Sri Lanka ◽  
Energy Budget ◽  
River Basins ◽  
Rainfall Runoff ◽  
Inundation Model

PREDICTING FLOOD INUNDATION AREA BY RAINFALL-RUNOFF-INUNDATION MODEL EMULATOR

2020 ◽  
Vol 76 (2) ◽  
pp. I_547-I_552
Author(s):  
Taisei SEKIMOTO ◽  
Satoshi WATANABE ◽  
Shunji KOTSUKI ◽  
Masafumi YAMADA ◽  
Shiori ABE ◽  
...  
Keyword(s):  
Flood Inundation ◽  
Rainfall Runoff ◽  
Inundation Area ◽  
Inundation Model

Trend and variability of rainfall in two river basins in Sri Lanka: an analysis of meteorological data and farmers’ perceptions

2017 ◽  
Vol 42 (8) ◽  
pp. 981-999 ◽  
Author(s):  
L. Muthuwatta ◽  
H. P. T. W. Perera ◽  
N. Eriyagama ◽  
K. B. N. Upamali Surangika ◽  
W. W. Premachandra
Keyword(s):  
Sri Lanka ◽  
Meteorological Data ◽  
River Basins

Response of Hydrological Process to Climate Change of Basins with Different Glacier Ratio in the Tibet Plateau

2020 ◽  
Author(s):  
Li Wang ◽  
Fan Zhang
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Negative Impact ◽  
Positive Impact ◽  
River Basins ◽  
Hydrological Processes ◽  
Tibet Plateau ◽  
Hydrological Process ◽  
Snow Melt ◽  
Rainfall Runoff

<p>The glacier ratio influences both the contribution of meltwater runoff and the response of the basin's hydrological processes to climate change. In this study, the Karuxung, the Tuotuo and the Babao river basins with glaciers accounting for 20.7%, 2.1% and 0.38% respectively, were selected to study their hydrological processes under the climate change. Based on the daily runoff data of 30 years and MODIS snow cover products, the J2000 model was applied to quantify the contribution of meltwater and rainfall runoff, analyze the temporal and spatial variation characteristics of runoff and clarify the influence of climate change on these three basin. The main findings are as follows: (1) The contribution of glacier and snow melt runoff for the Karuxung, Tuotuo and Babao river basin was 60.7%, 25.3% and 19.9%, respectively. The contribution of rainfall runoff for the three basins was 39.3%, 74.7% and 81.1%, respectively. (2) The peak of glacier and snow melt runoff converted from summer to spring with the glacier ratio decreasing. (3) The runoff supplies in the Karuxung, Tuotuo and Babao river basin were from the 5500m-6500m, 4500m-5500m zone, and 3500m-4500m elevation zone, respectively. (4) The runoff and its components in the Karuxung and Tuotuo river basins showed significant increasing trends while the Babao river basin showed no significant change trends. (5) In the Karuxung river basin with large glacier ratio, the increase in temperature mainly caused the increase of meltwater and runoff, showing a positive impact on runoff. For the Tuotuo and Babao river basin with small glacier ratios, the increase in temperature mainly caused increased evaporation and reduced runoff, showing a negative impact on runoff.</p>

Utilization of the Flood Simulation Model for Disaster Management of Local Government

2016 ◽  
Vol 11 (6) ◽  
pp. 1161-1175 ◽  
Author(s):  
Daisuke Kuribayashi ◽  
◽  
Miho Ohara ◽  
Takahiro Sayama ◽  
Atsuhiko Konja ◽  
...  
Keyword(s):  
Disaster Management ◽  
Flood Risk ◽  
Mountainous Region ◽  
Rainfall Runoff ◽  
Insufficient Information ◽  
Flood Simulation ◽  
Inundation Depth ◽  
Management Personnel ◽  
High Flood ◽  
Inundation Model

This paper proposes a method to evaluate the flood risk of each district in a municipality to assist disaster management personnel. The method is specifically for municipalities in a mountainous region where insufficient information is available for practical disaster management. Using this method, we conducted inundation analysis for multiple patterns of rainfall and discharge using a rainfall-runoff-inundation model, and estimated the maximum inundation depth and duration. Based on the estimation, we developed a “flood diagnostic chart” to evaluate district-level flood risk, additionally considering other indicators. Moreover, we located flood hotspots, which are areas requiring extra precautions because of the high flood risk for districts.

scholarly journals Model Sophistication in Relation to Scales in Snowmelt Runoff Modeling

2000 ◽  
Vol 31 (4-5) ◽  
pp. 267-286 ◽  
Author(s):  
Lars Bengtsson ◽  
Vijay P. Singh
Keyword(s):  
Stream Flow ◽  
Overland Flow ◽  
River Basins ◽  
Rainfall Runoff ◽  
Snowmelt Runoff ◽  
Degree Day ◽  
Groundwater Origin ◽  
Runoff Modeling ◽  
Snow Model ◽  
Runoff Model

Snowmelt induced runoff from river basins is usually successfully simulated using a simple degree-day approach and conceptual rainfall-runoff models. Fluctuations within the day can not be described by such crude approaches. In the present paper, it is investigated which degree of sophistication is required in snow models and runoff models to resolve the basin runoff from basins of different character, and also how snow models and runoff models must adapt to each other. Models of different degree of sophistication are tested on basins ranging from 6,000 km2 down to less than 1 km2. It is found that for large basins it is sufficient to use a very simple runoff module and a degree day approach, but that the snow model has to be distributed related to land cover and topography. Also for small forested basins, where most of the stream flow is of groundwater origin, the degree-day method combined with a conceptual runoff model reproduces the snowmelt induced runoff well. Where overland flow takes place, a high resolution snow model is required for resolving the runoff fluctuations at the basin outlet.

scholarly journals Evaluation of the appearing changes in water regime at Ráztoka and Červík basins in the Beskydy Mts.

Beskydy ◽  
2013 ◽  
Vol 6 (2) ◽  
pp. 135-148
Author(s):  
M. Tesař ◽  
J. Buchtele
Keyword(s):  
Time Series ◽  
Water Regime ◽  
Significant Contribution ◽  
River Basins ◽  
Hydrological Models ◽  
Rainfall Runoff ◽  
Clear Cutting ◽  
Daily Time Series ◽  
Large Floods ◽  
Daily Time

The influence of vast salvage clear cutting in some hilly regions induced by acid rains is sometimes considered as a significant contribution to the disastrous character of the recent floods. Then the considerations having also partly emotional character, appeared, namely after large floods in the Morava and Odra Rivers in the July 1997 and in the Labe River basins in August 2002. The simulations of rainfall-runoff process for several experimental catchments have been carried out using daily time series up to 50 years long. The outputs of hydrological models SAC-SMA and BROOK´90 provide naturally the differences between observed and simulated discharge, which could show the tendencies in the runoff. They have been analysed and findings indicate the increases of runoff after deforestation. The differences between observed and simulated flows can be helpful also for the assessment of changes in evapotranspiration demands as the significant long-termed phenomenon.

scholarly journals Test of a Modified Rainfall-runoff Model in Large-scale River Basins

2019 ◽  
Author(s):  
Spyros Giakoumakis ◽  
Dimitris Tigkas
Keyword(s):  
Large Scale ◽  
River Basins ◽  
Rainfall Runoff ◽  
Monthly Basis ◽  
Modified Model ◽  
East Central ◽  
Runoff Series ◽  
Rainfall Runoff Model ◽  
Measure Of Performance ◽  
Runoff Model

In this work a modified version of the well-known Simple Water Balance (SWB) model, comprising here three parameters instead of one, was used. Although simple, the model was tested in large-scale river basins in east-central Greece, upstream two hydrometric stations. The available historic runoff records comprised 19 hydrologic years each, on a monthly basis. Thirteen among them were used for calibrating the model, whereas the six subsequent, for validating it. Two different efficiency criteria were used as a measure of performance of the modified model. Their values, calculated for both calibration and validation stages, were close and relatively high. Thus, keeping in mind both the size and complexity of the river basins studied, one can conclude that the modified model, despite its simplistic concept and lumped form, fits satisfactorily the historic runoff series.

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