Chrey Bak River catchment is recognized by the Royal Government of Cambodia (RGC) as an important area for agricultural investment and development. As a consequence, the catchment has experienced intensive land use and land cover changes. The objectives of this paper are to investigate the land use change in Chrey Bak River catchment during 2010-2040 and to define the underlying factors/decision variables that affect to land use change and to use

Water allocation in the Chrey Bak catchment faces the management problem that can cause water scarcity. Thus, water management and allocation for agriculture is conducted using the WEAP model to predict water demand. The study depends on collected data such as, stream flow (discharge), irrigation water need for each irrigation scheme in the Stung Chrey Bak catchment which exist of 7 irrigation schemes. There are two scenario is created; the refer

Flood and drought have always been the most frequent disaster in the world record. Cambodia, being at rank of 116 of the most vulnerable country, has suffered so much from flood and drought. That’s why the main purpose of this study is to identify flood and drought characteristic. This study of flood and drought is based on CAESAR-Lisflood, a combination of CAESAR and LISFLOOD-FP. Study area of this case is Pursat Catchment. Calibration and valid

Discontinuous systems have been increasingly paid attention since they can be found ranging from physical to biological systems. In this paper we consider an effective estimation algorithm for systems with discontinuous vector field. We propose an incorporation between the existing recedinghorizon nonlinear Kalman filter (RNKF) and the unscented transformation, which is named receding-horizon unscented Kalman filter (RUKF). The use of unscented t

The influences of climate change have also covered Stung Chrey Bak Catchment,with increasing the significant issues over water demands for irrigation schemes. Thus, the aim of this research is to predict water demands of each irrigation schemes through climate change scenarios, using Water Evaluation and Planning model (WEAP). Stung Chrey Bak catchment consists of seven irrigation schemes. Two demand management scenarios were developed for this s

Asian white radish is a popular root vegetable in asia. It can be consummed as fresh, dried, salted and pickle products. Japanese pickle vegetable (nukazuke) fermented in rice bran bed. There is no research related to this fermentation in Cambodia. Therefore, the ojective of this study is to optimize the white radish fermentation wtith rice bran. In this study, the physicochemical composition in white radish and rice bran were analyzed such as pH

Biodiesel is a renewable green fuel obtained through the transformation of animal and vegetable fats, as well as used oil. This biodiesel can replace fossil diesel. The production of biodiesel from recycled oils is comparable in quality to that virgin vegetable oil biodiesel with an added attractive advantage of being lower in price. The current research was therefore to study the production of biodiesel from used frying oil for fried banana in P

The presence of high arsenic content in groundwaters in Kandal, Cambodia has threatened about 1 million people and several people have already been exposed to arsenic. This study aims to investigate the removal of arsenic from Kandal groundwater by utilizing naturally available laterite from Kampong Cham in order to obtain safe drinking water for the people. The laterites were characterized with XRD, XRF, zeta potential analyzer, and surface area

Concentration of arsenic in groundwater was investigated at three villages (Chong Prek, Prek Tameng and Prek Thom) in the Kandal Province of Cambodia, which ranged from 80.9 μg/L (in Prek Tameng village) to 1420 μg/L (in Prek Thom village), with average and median concentrations of 463.16 and 217 μg/L, respectively. Iron concentration was also determined. Nearly all the twenty-five samples contained arsenic and iron concentrations exceeding the W

Due to human activities such as batik home industries, abattoirs, and tanneries, the existence of heavy metals in dug-well water has been known as the cause of groundwater pollution in Yogyakarta City. To treat this dug-well water, a batch adsorption experiment by utilizing the activated zeolite and bentonite was carried out. Prior to the treatment, the zeolite and bentonite were characterized by means of XRD, SEM, XRF, and various ICP and modifi