Study of rainfall - runoff relationship for Langat river watershed by using HEC-HMS
In this era, we always heard about a flood problems occurrence in Malaysia. Malaysia is a country that subjected to flood problems because it was surrounded by South China Sea. In Malaysia, there are some places that have serious flood problems which is a state near with South China Sea such as i...
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| Main Author: | |
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| Format: | Undergraduates Project Papers |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/10076/1/MUHAMMAD%20HAFIZUDDIN%20BIN%20MD%20RASIB%20%23.PDF http://umpir.ump.edu.my/id/eprint/10076/ |
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| Summary: | In this era, we always heard about a flood problems occurrence in Malaysia. Malaysia is a
country that subjected to flood problems because it was surrounded by South China Sea. In
Malaysia, there are some places that have serious flood problems which is a state near with
South China Sea such as in Terengganu, Johor and Selangor. Langat River was located near
with Selangor and it is connected to the South China Sea. The places near with Langat
River always had a flood problem in every year. The thesis is conducted to stimulate the
precipitation-runoff processes of dendritic watershed systems. The thesis also prepared
validation and verification of HEC- HMS (hydrological model) to recorded data. After
these two objectives of study were completed, the appropriate model for flood hydrograph
prediction is produce. From the model, hopefully it will help to make a decision to prevent
a flood problem. HEC-HMS is a tool to produce a number of hydrologic modeling inputs. It
also can be used to recognize the rainfall- runoff relationship of Langat River in a certain
period. From the rainfall data, a hydrograph of Langat River can be obtained by using
analysis of relationship between rainfall and runoff. This hydrograph are used for studies of
urban drainage and flow forecasting. So, it can be guidance to people along Langat River
aware about flood problems and also can be flood control management in Langat River. By
referring to Root Mean Square Error (RMSE), as the value is near to zero, it is considered
as the best fit. The RMSE value obtained for
Figure 4.2, Figure 4.13, Figure 4.14 and
Figure 4.25
are 0.256 m
3
/s, 0.346 m
3/s, 1.121
M3
/s and 0.319
M3
/s respectively. As for
conclusion, SCS Unit Hydrograph method can be used for simulation in Langat River
basin. |
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