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Yogeswari, P.
- GIS Based Morphometric Analysis of a Microwatershed at Varaganadhi Basin, South Tamil Nadu, India
Abstract Views :134 |
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Authors
Affiliations
1 Deptt. of Civil Engineering, R.V.S. College of Engineering and Technology, Dindigul-624 005, T.N., IN
2 Deptt. of Civil Engineering, A. C. College of Engineering and Technology, Karaikudi, T.N., IN
3 Deptt. of Civil Engineering, P. S. N. A. College of Engineering and Technology, Dindigul-624 622, T.N., IN
1 Deptt. of Civil Engineering, R.V.S. College of Engineering and Technology, Dindigul-624 005, T.N., IN
2 Deptt. of Civil Engineering, A. C. College of Engineering and Technology, Karaikudi, T.N., IN
3 Deptt. of Civil Engineering, P. S. N. A. College of Engineering and Technology, Dindigul-624 622, T.N., IN
Source
Nature Environment and Pollution Technology, Vol 8, No 3 (2009), Pagination: 555-560Abstract
The geomorphologic conditions are essential pre-requisites in understanding the water bearing characteristics of hard rocks. Hence, in the present paper efforts have been made to identify the spatial distributed nature of the Varaganadhi watershed using Geographical Information System (GIS). GIS has also been used to describe the various thematic layers such as physiography, landuse/landcover, geomorphology, soil, etc. The morphological parameters such as stream order, stream length, bifurcation ratio, form factor, circulatory ratio, elongation ratio, drainage density, drainage frequency, ruggedness number, etc. were computed. Thematic maps pertaining to landuse/cover, geology, and geomorphology were colleted from PWD of Periyakulam, Theni, Tamilnadu. These maps were scanned and the images were georeferenced in Geomedia software and the basic morphometric parameters were calculated. Integration of base maps and morphometric parameters with geoprofessional techniques, has led into the delineation of the areas suitable for adapting soil and water conservation measures. In addition, usage of GIS in watershed management studies can help the planners in carrying out various watershed developmental activities like construction of culverts, design of spillways of small dams, construction of flood protection levees and agriculture, etc.Keywords
Morphometric Analysis, Microwatershed, Varaganadhi Basin, GIS.- Performance of Sorghum Genotypes under Zero Tillage Conditions in Rice Fallows with Reference to Stem Borer Chilo partellus
Abstract Views :203 |
PDF Views:63
Authors
Affiliations
1 Department of Entomology, Agricultural College, Bapatla 522 103, IN
2 Department of Environmental Science, Advanced Post Graduate Centre, Lam, Guntur 522 034, IN
1 Department of Entomology, Agricultural College, Bapatla 522 103, IN
2 Department of Environmental Science, Advanced Post Graduate Centre, Lam, Guntur 522 034, IN
Source
Current Science, Vol 117, No 4 (2019), Pagination: 692-699Abstract
A field experiment was carried out to screen the sorghum genotypes against stem borer in rice fallow under zero tillage condition. Based on mean stem tunnel length, the genotypes were categorized as least susceptible (0–5 cm), moderately susceptible (5–10 cm) and highly susceptible (>10 cm). The resistant check CSH 16 (C) was found least susceptible with 4.65 cm, whereas NTJ-2 (C), NLCW-6 and N-14 were found to be highly susceptible as they recorded 10.45, 10.46 and 11.44 cm mean stem tunnel length respectively. The remaining genotypes were moderately susceptible with 6.60–9.84 cm mean stem tunnel length. There was non-significant positive correlation between the number of larvae and leaf damage, dead hearts, stem tunnelling, white ears and chaffy grains respectively, but it was negative for tiller damage.Keywords
Genotypes, Sorghum, Stem Borer, Stem Tunnel Length, Susceptible.References
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