scholarly journals RAINFALL-RUNOFF ANALYSIS FOCUSED ON RAINFALL PATTERN AND ASSESSEMENT OF DAM EFFECTS ON FLOOD CONTROL IN TONE UPPER RIVER BASIN

2013 ◽  
Vol 69 (4) ◽  
pp. I_1621-I_1626
Author(s):  
Kazuhiro YOSHIMI ◽  
Tadashi YAMADA
Keyword(s):  
River Basin ◽  
Flood Control ◽  
Rainfall Pattern ◽  
Rainfall Runoff ◽  
Runoff Analysis

scholarly journals Rainfall-Runoff Models with Fractional Derivatives Applied to Kurau River Basin, Perak, Malaysia

2021 ◽  
Vol 34 ◽  
pp. 34-40
Author(s):  
Koichi Unami ◽  
Rasha M Fadhil ◽  
Md Rowshon Kamal
Keyword(s):  
River Basin ◽  
Flood Control ◽  
Fractional Derivatives ◽  
Daily Rainfall ◽  
Vital Role ◽  
Least Square ◽  
Rainfall Runoff ◽  
Arx Model ◽  
Runoff Modeling ◽  
Standard Linear

Kurau River Basin (KRB), which covers an area of 322 km2 and is the main drainage artery pouring into Bukit Merah Reservoir (BMR), is located in Perak State of Malaysia. The study of rainfall-runoff processes in KRB is important because BMR plays a vital role in rice production, flood control, ecosystems, and tourism in the region. This study proposes a new approach to rainfall-runoff modeling based on the fractional calculus. A dataset of daily rainfall and streamflow has been acquired. Then, the standard linear autoregressive with exogenous input (ARX) model is identified from the dataset in the sense of least square error. We consider the ARX model as a discretized differential equation with fractional orders. Such a model with fractional derivatives is versatile to represent hysteresis, which is intrinsically linked to the real runoff processes in tropical catchment basins like KRB.

Effective Flood Control Through Integrated and Collaborative Dam Operation at Three Dams in the Upper Nabari River

2012 ◽  
Vol 7 (5) ◽  
pp. 540-546 ◽  
Author(s):  
Takayoshi Matsumura ◽  
◽  
Hiroshi Kamiya ◽  
Naohiro Yoshida ◽  
Keyword(s):  
Water Level ◽  
River Basin ◽  
Flood Control ◽  
Early Stage ◽  
Control Point ◽  
Flood Damage ◽  
Rainfall Forecast ◽  
Recent Climate ◽  
Runoff Analysis ◽  
Flexible Operation

Heavy rain with Typhoon 18 threatened the Nabari River Basin, Kansai region, with inundation early on the morning of October 8, 2009. The Nabari River is a tributary of the Yodo river basin that contains Osaka and Kyoto and runs through Nabari City, which is a residential zone a commutable distance from Osaka city. In the upper reaches of the Nabari, there are three multipurpose dams – Shorenji Dam, Hinachi Dam, and Murou Dam – that are operated by the Kizugawa Integrated Dam Control and Management Office (KIDCMO), a branch office of the Japan Water Agency (JWA). Since it rained heavily downstream from the three dams, regular operation of the dams complying with given flood control regulations appeared unable to save Nabari City from inundation. The JWA and Ministry of Land, Infrastructure, Transport and Tourism (MLIT) therefore conducted collaborative operation of the three dams to avoid inundating the city. In this case, flood control operation of the three dams commenced at an early stage before inflow reached defined flood discharge in consideration of the water level of the Nabari River, rainfall conditions, and the capacity of reservoirs. During operation, discharge from dams was changed in a timely manner and appropriately through collaborative operation of the three dams in order to maximize the effectiveness of all flood control capacities of reservoirs based on the latest rainfall forecast technology and runoff analysis. The use of improved rainfall forecast technology and runoff analysis models enabled effective application of flexible operation protocols. It is estimated that this operation has resulted in a 1.5 m decrease in the water level at the Nabari design control point and saved approximately 1,200 households from inundation. Considering recent climate change, it is possible to have extreme rainfall more often. The proof of the adaptability of this flexible operation is quite meaningful not only for flood damage mitigation in the downstream but also for future prospects of flood control by dams.

scholarly journals The application of environmental governance for sustainable watershed-based management

2021 ◽  
Author(s):  
Seiichi Kagaya ◽  
Tetsuya Wada
Keyword(s):  
Environmental Protection ◽  
River Basin ◽  
Watershed Management ◽  
Water Use ◽  
Flood Control ◽  
Environmental Governance ◽  
Planning Process ◽  
Environment Assessment ◽  
Control Water

AbstractIn recent years, it has become popular for some of countries and regions to adapt the system of governance to varied and complex issues concerned with regional development and the environment. Watershed management is possibly the best example of this. It involves flood control, water use management and river environment simultaneously. Therefore, comprehensive watershed-based management should be aimed at balancing those aims. The objectives of this study are to introduce the notion of environmental governance into the planning process, to establish a method for assessing the alternatives and to develop a procedure for determining the most appropriate plan for environmental governance. The planning process here is based on strategic environment assessment (SEA). To verify the hypothetical approach, the middle river basin in the Tokachi River, Japan was selected as a case study. In practice, after workshop discussions, it was found to have the appropriate degree of consensus based on the balance of flood control and environmental protection in the watershed.

Comprehensive Flood Control Measures in the Tsurumi River Basin in Japan

1997 ◽  
Vol 22 (4) ◽  
pp. 252-258 ◽  
Author(s):  
Tadahiko Nakao ◽  
Koji Tanimoto
Keyword(s):  
River Basin ◽  
Flood Control ◽  
Control Measures

scholarly journals Runoff Analysis for Tropical River Basin Athi, Kenya

1995 ◽  
Vol 39 ◽  
pp. 19-24
Author(s):  
Shigeki KOBATAKE ◽  
Maurice O. Nyadawa
Keyword(s):  
River Basin ◽  
Tropical River ◽  
Runoff Analysis

scholarly journals Identification of the Impacts of Climate Changes and Human Activities on Runoff in the Jinsha River Basin, China

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Xiaowan Liu ◽  
Dingzhi Peng ◽  
Zongxue Xu
Keyword(s):  
Water Balance ◽  
River Basin ◽  
Human Activities ◽  
Climate Changes ◽  
Balance Method ◽  
Variation Method ◽  
Rainfall Runoff ◽  
Jinsha River ◽  
Water Balance Method ◽  
Double Mass

Quantifying the impacts of climate changes and human activities on runoff has received extensive attention, especially for the regions with significant elevation difference. The contributions of climate changes and human activities to runoff were analyzed using rainfall-runoff relationship, double mass curve, slope variation, and water balance method during 1961–2010 at the Jinsha River basin, China. Results indicate that runoff at upstream and runoff at midstream are both dominated by climate changes, and the contributions of climate changes to runoff are 63%~72% and 53%~68%, respectively. At downstream, climate changes account for only 13%~18%, and runoff is mainly controlled by human activities, contributing 82%~87%. The availability and stability of results were compared and analyzed in the four methods. Results in slope variation, double mass curve, and water balance method except rainfall-runoff relationship method are of good agreement. And the rainfall-runoff relationship, double mass curve, and slope variation method are all of great stability. The four methods and availability evaluation of them could provide a reference to quantification in the contributions of climate changes and human activities to runoff at similar basins in the future.

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