Paddy and Water Environment
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Self-organizing radial basis neural network for predicting typhoon-induced losses to rice
Paddy and Water Environment - Tập 11 - Trang 369-380 - 2012
The issue of the typhoon-induced economic losses to rice is investigated. In this study, we propose a hybrid self-organizing radial basis (SORB) neural network for estimating economic losses of rice for the whole Taiwan as well as three sub-regions. The data sets of 143 typhoon events from 1961 to 2008 were collected and analyzed. Data include rice losses and typhoon-related meteorological factors......
Application of topographic elevation data generated by remote sensing approaches to flood inundation analysis model
Paddy and Water Environment - - Trang 1-15 - 2024
High-resolution topographic data are crucial for delta water management, such as hydrological modeling, inland flood routing, etc. Nevertheless, the availability of high-resolution topographic data is often lacking, particularly in low-lying regions in developing countries. This data scarcity poses a significant obstacle to inland flood modeling. However, collecting detailed topographic data is de......
Rice farming and strategy to rural development
Paddy and Water Environment - Tập 3 - Trang 73-77 - 2005
Since 2004, Jong Wun Ahn is the President of Korea Agricultural and Rural Infrastructure Corporation (KARICO), which is a leading and unique government-run company in the field of agricultural and rural development and rural water management in Korea. He is also the Chairman of Korean National Committee (KCID) of International Commission on Irrigation and Drainage (ICID). For most of his 30-years ......
Evaluation of irrigation water requirements and crop yields with different irrigation schedules for paddy fields in ChiaNan irrigated area, Taiwan
Paddy and Water Environment - Tập 12 - Trang 71-78 - 2013
Recent water shortages in reservoirs have caused such problems as insufficient water and fallow rice fields in Southern Taiwan; therefore, comparing irrigation water requirements and crop production of paddy fields using a technique that differs from the conventional flood irrigation method is important. Field experiments for the second paddy field with four irrigation schedules and two repeated t......
A multidecadal change analysis for irrigation ponds in Taoyuan, Taiwan, using multisource data
Paddy and Water Environment - Tập 18 - Trang 1-14 - 2019
A multidecadal change analysis of the irrigation ponds in Taoyuan, Taiwan, was conducted by using multisource data including digitized ancient maps, declassified single-band CORONA satellite images, and multispectral SPOT images. Ponds and paddy fields are texturally similar but spectrally different, whereas the paddy fields and built-up are texturally different but spectrally similar. In this stu......
Performance of a ring-shaped emitter for subsurface irrigation in bell pepper (Capsicum annum L.) cultivation
Paddy and Water Environment - Tập 17 - Trang 101-107 - 2019
A low-cost subsurface irrigation system with ring-shaped emitters has been applied and considered as a way to improve water irrigation efficiency in a region where farming is performed on a small scale, especially in rural areas of Indonesia. To build a ring-shaped emitter, a rubber water hose was bent into a ring shape with a diameter of about 20 cm, and a given number of 5-mm holes were drilled ......
Evaluation of the water-quality dynamics in a eutrophic agricultural pond by using a one-box ecosystem model considering several algal groups
Paddy and Water Environment - Tập 8 - Trang 301-318 - 2010
The Okubo pond is an agricultural pond located in the Itoshima area of Fukuoka Prefecture, Japan. It was constructed for irrigating a nearby cultivated area. A monitoring program from August 11 to November 26, 2008, suggested the risk of eutrophication in the water body. The high total nitrogen concentration (1.34 mg/l), high total phosphorus concentration (0.06 mg/l) and extreme oxygen depletion ......
Models of the interconnection of pumps to supply water to branched networks
Paddy and Water Environment - Tập 11 - Trang 423-431 - 2012
The basic concepts from a hydraulic and mathematical point of view were introduced to describe the operation of a hydraulic branched network of water distribution. Moreover, each one of the elements (simples and complex) of the system was identified. Classic hydraulic equations were inputted to apply them to branched networks and obtain a standard solution. A set of linear and non-linear equations......
Partition of geogenic nickel in paddy soils derived from serpentinites
Paddy and Water Environment - Tập 14 - Trang 417-426 - 2015
Serpentinitic soils contain high concentrations of geogenic Ni. During serpentinitic mineral weathering, the Ni released from soils into ecosystems could be a source of non-anthropogenic metal contamination. In this study, soil samples were collected from two pedons in paddy fields in Taiwan and Japan; these samples were used to explore the profile distribution of total and labile Ni, demonstratin......
Nitrogen and phosphorus runoff modeling in a flat low-lying paddy cultivated area
Paddy and Water Environment - Tập 6 - Trang 405-414 - 2008
Chiyoda basin is located in Saga Prefecture in Kyushu Island, Japan, and lies next to the tidal compartment of the Chikugo River to which the excess water in the basin is drained away. Chiyoda basin has a total area of about 1,100 ha and is a typical flat and low-lying paddy-cultivated area. The main environmental issue in this basin is total nitrogen (TN) and total phosphorus (TP) load management......
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