Your search found 26 records
1 Chandrasekera, C. M. M. M. K.; de Silva, R. P.; Manthrithilaka, H. 2000. Detection of land use changes through GIS functionality: A case study in Randenigala and Kotmale subcatchments. In Nissanka, S. P. (Ed.), Tropical agricultural research. Vol.12, 2000. Peradeniya, Sri Lanka: PGIA. pp.276-286.
Catchment areas ; Land use ; Assessment ; GIS ; Databases ; Monitoring ; Case studies ; Deforestation / Sri Lanka / Randenigala / Kotmale
(Location: IWMI-HQ Call no: 630.72 G744 NIS Record No: H027101)
2 de Silva, R. P.. 2001. Spatial data and spatial databases in Sri Lanka - Challenges in the new millennium. Daily News, Wednesday 19 July:4p.
(Location: IWMI-HQ Call no: P 5734 Record No: H028345)
3 Bandara, I. B. J.; De Silva, R. P.; Singh, R. K. 2003. Remote sensing and GIS based methodology for curve number estimation in rainfall-runoff modelling. Tropical Agricultural Research, 15:307-315.
Rainfall-runoff relationships ; Estimation ; GIS ; Satellite surveys ; Models ; Land use ; Catchment areas ; Watersheds / India / Doon Valley / Bainkhala Watershed
(Location: IWMI-HQ Call no: P 6632 Record No: H033448)
4 de Silva, R. P.. 2000. Modelling the uptake of soil water at different depths by tea (Camellia sinensis) plants. Journal of the National Science Foundation Sri Lanka, 28(1):87-101.
(Location: IWMI-HQ Call no: P 7094 Record No: H035901)
5 de Silva, R. P.. 2002. The effect of length of time period considered in estimating groundwater recharge with soil water budget model. Journal of the National Science Foundation Sri Lanka, 30:109-122.
(Location: IWMI-HQ Call no: P 7106 Record No: H035934)
6 Gunawardana, O. A.; de Silva, R. P.. 2002. A short history of irrigation engineering in Sri Lanka up to 2000 AD. Kotte, Sri Lanka: R. P. de Silva. 25p.
(Location: IWMI-HQ Call no: 631.7.1 G744 GUN Record No: H036002)
7 de Silva, R. P.. 2000. A simple soil water balance model to estimate groundwater recharge in the dry zone of Sri Lanka. Tropical Agricultural Research and Extension, 3(2):120-126.
(Location: IWMI-HQ Call no: P 7110 Record No: H036003)
8 de Silva, R. P.. 2001. A comparison of actual and potential recharge of water table in the dry zone of Sri Lanka. Tropical Agricultural Research and Extension, 4(2):90-96.
Aquifers ; Recharge ; Estimation ; Arid zones ; Water table ; Soil water ; Water budget ; Models / Sri Lanka
(Location: IWMI-HQ Call no: P 7111 Record No: H036004)
9 de Silva, R. P.. 1999. Estimating the rate of recharge to the groundwater table using environmental chloride as a tracer. Tropical Agricultural Research and Extension, 2(1):44-50.
Groundwater ; Recharge ; Estimation ; Water table ; Soil properties ; Soil water ; Water balance ; Models ; Rain / Sri Lanka
(Location: IWMI-HQ Call no: P 7112 Record No: H036005)
10 de Silva, R. P.. 2005. Limitations of a soil water budgeting method in estimating groundwater recharge with particular reference to the dry zone of Sri Lanka. Journal of the National Science Foundation Sri Lanka, 33(2):99-113.
(Location: IWMI-HQ Call no: P 7480 Record No: H038148)
11 Rinos, M. H. M.; Aggarwal, S. P.; De Silva, R. P.. 2001. Empirical erosion modeling in GIS with multi-sensor and multi-temporal satellite data. Tropical Agricultural Research, 13:177-188.
Erosion ; Assessment ; Watersheds ; GIS ; Mathematical models / India / Bata Watershed / Himachal Pradesh
(Location: IWMI-HQ Call no: P 7670 Record No: H039428)
12 Wickramasinghe, M. P. A.; Dayawansa, N. D. K.; de Silva, R. P.. 2006. Crop area estimation in Mahweli System C, Sri Lanka using remotely sensed data. SAARC Journal of Agriculture, 4:221-234.
Remote sensing ; Land use ; Mapping ; Crop yield ; Forecasting ; Rice ; Paddy fields ; Estimation / Sri Lanka / Mahaweli System C
(Location: IWMI HQ Call no: P 7925 Record No: H040239)
13 Gunawardana, I. P. P.; de Silva, R. P.; Dayawansa, N. D. K. 2005. Identification of appropriate technology for rainwater harvesting in Moneragala District. In Galagedara, L. W. (Ed.). Water resources research in Sri Lanka: Symposium Proceedings of the Water Professional’s Day 2005. Peradeniya, Sri Lanka: PGIA. pp.63-67.
Water harvesting ; Surveys ; Water balance ; Simulation models ; Domestic water ; Water storage ; Tanks / Sri Lanka / Moneragala District
(Location: IWMI HQ Call no: IWMI 631.7 G744 DAY Record No: H040706)
14 Bandara, S. M. S. P.; De Silva, R. P.. 2006. Geomorphological characteristics of selected watersheds in Sri Lanka. In Dayawansa, N. D. K. (Ed.). Water resources research in Sri Lanka: symposium proceedings of the Water Professional’s Day 2006, Postgraduate Institute of Agriculture, University of Peradeniya, Sri Lanka, 1 October 2006. Peradeniya, Sri Lanka: University of Peradeniya. Postgraduate Institute of Agriculture (PGIA). pp.153-163.
Watersheds ; Hydrology ; Geomorphology ; Rivers ; Flow ; Climate ; Drainage / Sri Lanka / Walawe Ganga / Menik Ganga / Kirindi Oya / Gin Ganga
(Location: IWMI HQ Call no: 631.7 G744 DAY Record No: H040731)
15 De Silva, R. P.; Gunasena, C. P. 2006. Spatial statistics: theory and applications. 2nd Ed. Peradeniya, Sri Lanka: Geo-Informatics Society of Sri Lanka (GISSL) 297p.
Statistical methods ; GIS ; Spatial information ; Hydrology ; Water supply ; Drinking water ; Natural resources management ; Time series / Sri Lanka / Hambantota District / Kurunegala District / Mahailluppallama
(Location: IWMI HQ Call no: 526.0285 744 DES Record No: H040755)
(0.41 MB)
16 De Silva, R. P.. 2006. Geo-informatics dictionary: Geographic Information Systems (GIS), remote sensing (optical and microwave), Global Positioning Systems (GPS) 3rd Ed. Peradeniya, Sri Lanka: Geo-Informatics Society of Sri Lanka (GISSL) 246p.
(Location: IWMI HQ Call no: 526.0285 G000 DES Record No: H040735)
(0.67 MB)
17 De Silva, R. P.. (Ed.) 2005. Geo-information for future of Sri Lanka: proceedings of the Second National Symposium on Geo-Informatics, Peradeniya, Sri Lanka, 26 August 2005. Peradeniya, Sri Lanka: Geo-Informatics Society of Sri Lanka (GISSL) 185p.
GIS ; Remote sensing ; Food insecurity ; Poverty ; Irrigated farming ; Watersheds ; Soil conservation ; Water conservation ; Groundwater potential ; Water supply ; Flooding / Sri Lanka / India / Uda Walawe / Matale District / Pallepola / Karso Watershed / Samanalawewa Hydropower Project / Colombo / Ratnapura
(Location: IWMI HQ Call no: 526.0285 G744 DES Record No: H040866)
18 De Silva, R. P.. (Ed.) 2005. Sweden international training course on remote sensing education for educators, decadal proceedings 1990-2004: a collection of selected papers submitted by former participants. Peradeniya, Sri Lanka: Geo Informatics Society of Sri Lanka (GISSL) 116p.
GIS ; Remote sensing ; Habitats ; Mapping ; Rivers ; Ecosystems ; Soil fertility ; Groundwater recharge ; Land use ; Land cover / Nepal / Thailand / Sri Lanka / Vietnam / Chitwan District / Narayani River / Horton Plains / Deduru Oya / Uma Oya / Suoi Muoi Catchment
(Location: IWMI HQ Call no: 526.0285 G570 DES Record No: H040875)
19 Jayasekare, A. S.; Dayawansa, N. D. K.; De Silva, R. P.; Muthuwatta, Lal P. 2005. Spatially distributed hydrological modeling of Upper Uma Oya Catchment using soil and water assessment tool SWAT. In De Silva, R. P. (Ed.). Sweden International Training Course on Remote Sensing Education for Educators, Decadal Proceedings 1990-2004: a collection of selected papers submitted by former participants. Peradeniya, Sri Lanka: Geo Informatics Society of Sri Lanka (GISSL) pp.65-85.
River basins ; Catchment areas ; Hydrology ; Groundwater recharge ; Land use ; Planning ; Simulation models ; GIS / Sri Lanka / Upper Uma Oya Catchment
(Location: IWMI HQ Call no: 526.0285 G570 DES Record No: H040879)
20 Liyanagunawardana, D.; de Silva, R. P.. 2005. Remote sensing and GIS assisted catchment information system for Nanu Oya Catchment in Kandy District. Sri Lanka Journal of Geo-Informatics, 2: 23-32.
(Location: IWMI HQ Call no: P 7992 Record No: H040889)
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