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31.
V. C. Goyal Sanjay K. Jain Navneet Pareek 《Journal of the Indian Society of Remote Sensing》2005,33(1):7-15
Water logging is one of the major land degradation processes that restricts the economic and efficient utilisation of soil
and land resources in command areas. Since independence, various irrigation schemes, for providing water for agriculture and
drinking have been taken up by Central and State agencies in India. In most of these schemes very little efforts have been
made for proper drainage. Obstruction of natural drainage by way of construction of roads, railways, aerodrome, various structures,
etc., causes the ponding of monsoon runoff on the upstream of the structures.
Periodic monitoring of command areas helps in analysing the extent of water logging, and should help in taking suitable remedial
measures. Remote sensing and GIS are powerful tools, which could be effectively used to study the dynamic behaviour of waterlogged
areas. In this study, waterlogged and salt-affected areas have been estimated in the command area of Ravi-Tawi Irrigation
Complex in Jammu region. About 14% of the total command area is water logged/ salt-affected. Being a new project, this area
is likely to grow in future when the project runs with its installed capacity, and as the distributaries expand in the command
area. Plausible causes of water logging have been discussed, and remedial measures suggested for reclaiming operations. 相似文献
32.
R L Ahuja M L Manchanda B S Sangwan V P Goyal R P Agrawal 《Journal of the Indian Society of Remote Sensing》1992,20(2-3):105-120
Visual interpretation of IRS-1A LISS-II (October 1988 & Feb. 1989) FCC (spectral bands 2, 3 & 4) at 1:50,000 scale was carried out for soil resource mapping of Bhiwani district (Haryana State) covering on area of 5099 sq. kim. Based on image characteristics, element analysis (landform, vegetation & erosion) and field traverses, physiography-soil relationship was established. Major physiographic units identified in the area are: Aeolian plain, Fluvio-acolian plain, Transitional plain, Alluvial plain, Hills and Pediments. Area was divided into 34 subunits. Final physiography-soil map on 1:50,000 scale was prepared. Taxonomically, the soils of each unit were classified and are found as: In aeolian plain—Typic Torripsamments/coarse loamy, Typic Camborthios; Fluvio-aeolian plain-Aridic Ustipsamments/coarse loamy/fine loamy Typic/Udic Ustochrepts; Alluvial plain—Typic Ustipsamments/coarse loamy/fine loamy Typic/Udic Ustochrepts; Hills and Pediments—fregmental Lithic Torriorthents/Typic Torripsamments. Interpretation for each subunit was made regarding land suitability for various land utilisation types. It was found that hills and pediments, dunal ridges, dunal complexes and serub-lands are best suitable for forestry and horiculture plantations. Dunal plains and inter-dunal depressions are best suitable for gram/bajra/oilseeds/guar, very gently sloping dunal plain and low lying plain are suitable for wheat/arhar/cotton/sunflower. 相似文献
33.
Kuldeep Singh Navin Kumar V. P. Goyal 《Journal of the Indian Society of Remote Sensing》1989,17(2):7-13
A study on the profile distribution of DTPA extractable iron, manganese, copper and zinc and physicochemical properties in ten delineated landforms of the Sahibi river basin of Haryana was underaken. Mean values for available Fe, Mn, Cu and Zn were 9.0, 11.6, 2.3 and 0.35 ppm, respectively. The soils of this area are potentially deficient in zinc. The soils of various landforms were adequately supplied with available Fe, Mn and Cu at present. In most of the soil pedons distribution of micronutrients did not follow any typical pattern neither with depth nor with landforms perhaps due to their weak pedogenic manifestation. Based on multiple regression analysis 68, 70, 71 and 16% of the variations in contents of available Fe, Mn, Cu and Zn, respectively were accountable to the simultaneous influence of various soil parameters studied. 相似文献
34.
ABSTRACT This paper presents an analysis of trends in six drought variables at 566 stations across India over the period 1901–2002. Six drought variables were computed using standardized precipitation index (SPI). The Mann-Kendall (MK) trend test and Sen’s slope estimator were used for trend analysis of drought variables. Discrete wavelet transform (DWT) was used to identify the dominant periodic components in trends, whereas the significance of periodic components was examined using continuous wavelet transform (CWT) based global wavelet spectrum (GWS). Our results show an increasing trend in droughts in eastern, northeastern and extreme southern regions, and a decreasing trend in the northern and southern regions of the country. The periodic component influencing the trend was 2–4 years in south, 4–8 years in west, east and northeast, 8–64 years in central parts and 32–128 years in the north; however, most of the periodic components were not statistically significant. 相似文献
35.
36.
Goyal RS 《Population geography : a journal of the Association of Population Geographers of India》1988,10(1-2):61-72
Regional variations in the demography of India are explored using official data for the period 1971-1981. Socioeconomic and cultural determinants of such differentials, particularly female education and economic diversification, are addressed. 相似文献
37.
Ocean Dynamics - A mathematical model based on the three-dimensional (3-D) boundary element method (BEM), including porous and non-porous breakwaters, is developed to determine the wave trapping... 相似文献
38.
Kumar Gulshan Bhadwal Reetika Kumar Mukesh Kumari Punam Kumar Arvind Walia Vivek Mehra Rohit Goyal Ayush 《Natural Hazards》2022,111(3):2219-2240
Natural Hazards - This work reports radon-thoron monitoring at two depths (60 and 90 cm) and at 82 sites around Jawalamukhi thrust of NW Himalaya, India using Solid State Nuclear Track... 相似文献
39.
Natural Hazards - In the Indian Himalayan region, landslide is one of the most recurring natural disasters intimidating human lives and is detrimental to infra-structures,... 相似文献
40.
Douglas M. Mackay Murray D. Einarson Phil M. Kaiser Mamie Nozawa‐Inoue Sham Goyal Irina Chakraborty Ehsan Rasa Kate M. Scow 《Ground water》2012,50(6):895-907
A tracer plume was created within a thin aquifer by injection for 299 d of two adjacent “sub‐plumes” to represent one type of plume heterogeneity encountered in practice. The plume was monitored by snapshot sampling of transects of fully screened wells. The mass injection rate and total mass injected were known. Using all wells in each transect (0.77 m well spacing, 1.4 points/m2 sampling density), the Theissen Polygon Method (TPM) yielded apparently accurate mass discharge (Md) estimates at three transects for 12 snapshots. When applied to hypothetical sparser transects using subsets of the wells with average spacing and sampling density from 1.55 to 5.39 m and 0.70 to 0.20 points/m2, respectively, the TPM accuracy depended on well spacing and location of the wells in the hypothesized transect with respect to the sub‐plumes. Potential error was relatively low when the well spacing was less than the widths of the sub‐plumes (>0.35 points/m2). Potential error increased for well spacing similar to or greater than the sub‐plume widths, or when less than 1% of the plume area was sampled. For low density sampling of laterally heterogeneous plumes, small changes in groundwater flow direction can lead to wide fluctuations in Md estimates by the TPM. However, sampling conducted when flow is known or likely to be in a preferred direction can potentially allow more useful comparisons of Md over multiyear time frames, such as required for performance evaluation of natural attenuation or engineered remediation systems. 相似文献