This paper presents the detailed calibration and verificationof the NAM rainfall-runoff model parameters for one of the catchments in theNorth-West region of Bangladesh. The model calibration was carried outagainst both observed runoff and observed groundwater level. Calibrationresults of the model exhibit excellent agreement with both types of field data. Verification results give reasonable correspondence with observed runoff and aperfect match with observed groundwater level. Finally, the outcome of thisstudy supports the contention that the NAM rainfall-runoff model could beapplied successfully in context of Bangladesh.

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A rainfall-runoff model is developed using the system analysisapproach. The model is calibrated and verified against two Bangladeshwatersheds and compared with the NAM model. The proposed model parametersare realistic, and matching of estimated discharge against observed dischargeis within tolerable limits of error. Model efficiency implies that theproposed model is as good as the NAM model. The proposed model may behelpful for runoff estimation in other geographical regions also.

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In the Philippines, the rapid and ever-increasing rate of soilerosion, especially in the uplands and hilly areas, has aroused great concern. Several strategies, either existing or developed, have been used to try to preventor slow down the degradation process. One such strategy is agroforestry. One of the most important roles of agroforestry is the minimization of surfacerunoff, soil erosion, and nutrient loss. Several agroforestry systems adoptedin various parts of the country are indigenous or age-old practices whichinclude rice terracing, rotation agroforestry, and multistory systems. Others, such as alley cropping, were developed to enable planting along contours onloping areas.
However, it is apparent that continued research and intensive informationdissemination is necessary. Moreover, the cooperation of all parties, especially farmers, is important in order to achieve agricultural and ecological sustainabilitythrough agroforestry.
This report aims to document and review the importance of agroforestrysystems in ameliorating soil conservation problems in the Philippines.

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The 15th ICID (International Commission on Irrigation and Drainage) Congresswas held at The Hague, The Netherlands from 30 August to 11 September 1993.Around 750 participants from 65 countries attended the congress with the themeof “Water Management in the Next Century”. Japanese National Committee ofICID dispatched a total of 39 engineers and researchers from Japan to theCongress. In the sessions for paper presentations, seven papers were presentedby Japanese rescarchers and engineers. The followings are the abstracts of thepapers.

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