Ix Nan River Basin

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IX NAN RIVER BASIN 174 N.1 Nan River at Forestry Office, Nan 348 175 N.2B Nan River at Nai Mueang, Uttaradit 350 176 N.5A Nan River at Mueang, Phitsanulok 352 177 N.7A Nan River at Ban Rat Chang Khwan, Phichit 354 178 N.8A Nan River at Ban Hor Krai, Phichit 356 179 N.10A Nan River at Ban Taphan Hin, Phichit 358 180 N.12A Nan River at Ban Hat Phai, Uttaradit 360 181 N.13A Nan River at Ban Bun Nak, Nan 362 182 N.14A Nan River at Wat Luang Pho Kaeo, Nakhon Sawan 364 183 N.22A Khwae Noi River at Ban Tha Ngam, Phitsanulok 366 184 N.24A Khek River at Ban Wang Nok Aen, Phitsanulok 368 185 N.27A Nan River at Ban Nong Kham, Phitsanulok 370 186 N.28A Khlong Tron at Ban Na Klam, Uttaradit 372 187 N.36 Nam Khwae Noi at Ban Nong Krathao, Phitsanulok 374 188 N.37 Nan River at Ban Thap Krit, Nakhon Sawan 376 189 N.43A Khlong Chom Phu at Ban Chom Phu, Phitsanulok 378 190 N.49 Nam Yao at Ban Nam Yao, Nan 380 191 N54N.54 KhlongKhlong WWangang PPongong aatt BBanan WWangang PPongong, PhPhetchabunetchabun 382 192 N.55 Nam Phak at Ban Tha Sakae, Phitsanulok 384 193 N.58 Nam Fua at Ban Nam Fua, Phitsanulok 386 194 N.59 Lam Nam Khan at Ban Na Pho Na Chan, Phitsanulok 388 195 N.60 Nan River at Ban Hat Song Khwae, Uttaradit 390 196 N.62 Huai Nam Khlung at Ban Huai Tha Nua, Phitsanulok 392 197 N.64 Nan River at Ban Pha Khwang, Nan 394 198 N.65 Nam Yao at Ban Pang Sa, Nan 396 199 N.66 Huai Om Sing at Ban Noen Phoem, Phitsanulok 398 200 N.67 Nan River at Ban Koei Chai, Nakhon Sawan 400 201 N.68 Nan River at Ban Tha Takhian, Phitsunulok 402 202 N.72 Khlong Tron at Ban Wang Pla Kod, Uttaradit 404 203 N.73 Khek River at Ban Tan Tawan, Phetchabun 406 204 N.74 Nan River at Bang Krathum, Phitsanulok 408 205 N.75 Nam Wa at Tha Li Bridge, Nan 410 206 N.81 Nam Khwae Noi at Ban Kaeng Bua Kham , Phitsanulok 412.

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Japan International Cooperation Agency (Jica)
Project for the Comprehensive Flood Management Plan Main Report for the Chao Phraya River Basin in the Kingdom of Thailand Chapter 9 Strategy of Master Plan Formulation CHAPTER 9 STRATEGY OF MASTER PLAN FORMULATION 9.1 Basic Approach to the Master Plan 9.1.1 Concept of Master Plan The Chao Phraya River Basin is composed of three (3) areas; namely, the Highlands, the Upper Central Plain and the Lower Central Plain. The characteristics of each area and its required measures have been examined to formulate the Master Plan of Flood Disaster Management for the Chao Phraya River Basin. The study area is outlined from flood disaster management aspects as follows: 1) The Highlands are the watersheds of the major tributaries of the Chao Phraya River Basin, which are the Ping, Wang, Yom and Nan rivers. The areas are covered by forest, but the forest area has been devastated and the degraded forest areas have been identified by the Royal Forest Department. For flood disaster management, restoration of the degraded forest areas and the improvement of forest management are required. 2) The Upper Central Plain is located at the Upper Nakhon Sawan and composed of the river basins of the Ping, Wang, Yom, Nan and Chao Phraya. During the 2011 flood in the Upper Central Plain the inundation started along the Yom River in late July and at Nakhon Sawan in early September. The areas are flat and have wide low-lying areas along the rivers, which have a functional role in natural flood retarding basin and partly habitual inundation areas in rainy season, but partly used as agricultural lands in dry season.
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Thailand Flood 2011, One Year Retrospective
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Did the Construction of the Bhumibol Dam Cause a Dramatic Reduction in Sediment Supply to the Chao Phraya River?
water Article Did the Construction of the Bhumibol Dam Cause a Dramatic Reduction in Sediment Supply to the Chao Phraya River? Matharit Namsai 1,2, Warit Charoenlerkthawin 1,3, Supakorn Sirapojanakul 4, William C. Burnett 5 and Butsawan Bidorn 1,3,* 1 Department of Water Resources Engineering, Chulalongkorn University, Bangkok 10330, Thailand; [email protected] (M.N.); [email protected] (W.C.) 2 The Royal Irrigation Department, Bangkok 10300, Thailand 3 WISE Research Unit, Chulalongkorn University, Bangkok 10330, Thailand 4 Department of Civil Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani 12110, Thailand; [email protected] 5 Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL 32306, USA; [email protected] * Correspondence: [email protected]; Tel.: +66-2218-6455 Abstract: The Bhumibol Dam on Ping River, Thailand, was constructed in 1964 to provide water for irrigation, hydroelectric power generation, flood mitigation, fisheries, and saltwater intrusion control to the Great Chao Phraya River basin. Many studies, carried out near the basin outlet, have suggested that the dam impounds significant sediment, resulting in shoreline retreat of the Chao Phraya Delta. In this study, the impact of damming on the sediment regime is analyzed through the sediment variation along the Ping River. The results show that the Ping River drains a mountainous Citation: Namsai, M.; region, with sediment mainly transported in suspension in the upper and middle reaches. By contrast, Charoenlerkthawin, W.; sediment is mostly transported as bedload in the lower basin. Variation of long-term total sediment Sirapojanakul, S.; Burnett, W.C.; flux data suggests that, while the Bhumibol Dam does effectively trap sediment, there was only a Bidorn, B.
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Food Source for Hydropsychid Larvae During an Algae Bloom in Nan River, Nan Province, Thailand (Trichoptera: Hydropsychidae)
Zoosymposia 18: 009–016 (2020) ISSN 1178-9905 (print edition) https://www.mapress.com/j/zs ZOOSYMPOSIA Copyright © 2020 · Magnolia Press ISSN 1178-9913 (online edition) https://doi.org/10.11646/zoosymposia.18.1.4 http://zoobank.org/urn:lsid:zoobank.org:pub:D579A2B4-0C6F-419C-AF36-4A815ED0FF8F Food Source for Hydropsychid Larvae during an Algae Bloom in Nan River, Nan Province, Thailand (Trichoptera: Hydropsychidae) PORNPIMON BUNTHA1,2, SIRIPEN TRAICHAIYAPORN1,3 & DECHA THAPANYA1,4,* 1Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 2 �[email protected]; https://orcid.org/0000-0003-0014-4437 3 �[email protected]; https://orcid.org/0000-0002-0882-9505 4 �[email protected]; https://orcid.org/0000-0002-5996-6323 *Corresponding author: �[email protected] Abstract During November–March, blooms of Kai algae genera are commonly seen on rocks and cobblestones in the Nan River, providing habitat for hydropsychid larvae. This study attempted to determine a dietary relationship between the caddisflies and Kai algae by comparing gut contents of hydropsychid larvae between areas with and without Kai algae (Kai-blooming and Control sites). Fourteen specimens of Hydropsyche and Potamyia larvae were collected in the Kai-blooming and Control sites, respectively. Food items in the foreguts were classified as Kai algae (KA), other filamentous algae (OFA), diatoms (DT) and other items (OI). Although the main food type of larvae in both sites was Kai algae, the proportion of KA in larval foreguts from Kai-blooming sites was significantly higher than in those from Control sites (p < 0.05). In addition, larvae in the Kai-blooming area had a significantly lower proportion of OI than in the Control area (p < 0.05).
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Flood Effects on Water Quality and Benthic Fauna Diversity in the Upper Chao Phraya River and the Lower Ping and Nan Rivers, Thailand
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Malacological Survey in the Sirikit Reservoir, the Largest Earthfilled Dam in Thailand
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Chao Ph Raya River Basin, Thailan D
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