Remote Sensing Applications to Water Resources

Kumar, D. Nagesh

doi:10.1142/9789812777614_0008

Cited by 17 publications

(22 citation statements)

References 98 publications

(71 reference statements)

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“…However, point measurements do not effectively reflect spatial and temporal variability [13]. Understanding the spatiotemporal variations of climate variables such as rainfall and evapotranspiration (ET) is vital for proper planning and management of water for agriculture, especially where crop water requirements commonly exceed rainfall [14][15][16][17][18]. The collection of field data is not only prohibitively expensive but also complex, in particular for large and medium size irrigation schemes such as those in Swaziland.…”

Section: Introductionmentioning

confidence: 99%

Global Satellite-Based ET Products for the Local Level Irrigation Management: An Application of Irrigation Performance Assessment in the Sugarbelt of Swaziland

Karimi

Bongani²,

Blatchford

et al. 2019

Remote Sensing

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Remote sensing techniques have been shown, in several studies, to be an extremely effective tool for assessing the performance of irrigated areas at various scales and diverse climatic regions across the world. Open access, ready-made, global ET products were utilized in this first-ever-countrywide irrigation performance assessment study. The study aimed at identifying ‘bright spots’, the highest performing sugarcane growers, and ‘hot spots’, or low performing sugarcane growers. Four remote sensing-derived irrigation performance indicators were applied to over 302 sugarcane growers; equity, adequacy, reliability and crop water productivity. The growers were segmented according to: (i) land holding size or grower scale (ii) management regime, (iii) location of the irrigation schemes and (iv) irrigation method. Five growing seasons, from June 2005 to October 2009, were investigated. The results show while the equity of water distribution is high across all management regimes and locations, adequacy and reliability of water needs improvement in several locations. Given the fact that, in general, water supply was not constrained during the study period, the observed issues with adequacy and reliability of irrigation in some of the schemes were mostly due to poor scheme and farm level water management practices. Sugarcane crop water productivity showed the highest variation among all the indicators, with Estate managed schemes having the highest CWP at 1.57 kg/m3 and the individual growers recording the lowest CWP at 1.14 kg/m3, nearly 30% less. Similarly center pivot systems showed to have the highest CWP at 1.63 kg/m3, which was 30% higher than the CWP in furrow systems. This study showcases the applicability of publicly available global remote sensing products for assessing performance of the irrigated crops at the local level in several aspects.

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Section: Introductionmentioning

confidence: 99%

Global Satellite-Based ET Products for the Local Level Irrigation Management: An Application of Irrigation Performance Assessment in the Sugarbelt of Swaziland

Karimi

Bongani²,

Blatchford

et al. 2019

Remote Sensing

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“…To achieve these objectives the program is divided into four semesters. First semester, the students are exposed to Advanced The point to be taken from the above discussion is that, the geospatial technology has already proven its capabilities in addressing almost all the objectives of this program (Smith, 1997;Ritchie et al, 2003;Garg and Jothiprakash, 2012;Aggarwal et al, 2013;Garg et al, 2013;Aggarwal et al, 2014;Thakur et al, 2015;Garg et al, 2017a,b;Ghosh et al, 2017;Thakur et al, 2017a,b;Nikam et al, 2018;Nagesh Kumar and Reshmidevi, 2013).…”

Section: Present Status Of Geospatial Technology As Subject In Civil mentioning

confidence: 99%

Importance of Incorporation of Geospatial Technology Applications in Water Resources at Graduate and Post-Graduate Courses of Civil Engineering

Garg

Nikam

Thakur

et al. 2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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vaibhav, bhaskarnikam, praveen, spa, arpit, pdh)@iirs.gov.in Commission V, WG V/7 ABSTRACT:Water is a very crucial element to sustain life on earth. The availability of water varies both spatially and temporally. India being a water stress country, the per capita availability of water is reducing with time. It is predicted that by 2050 around 54% of the country will be water scarce. The changing climate along with the ever-increasing population is putting additional stress on water availability. The science of water, its availability and distribution on earth and its atmosphere, is generally regarded as hydrology. The important aspects of hydrology and hydraulic or more broadly water resources are taught as the subject or optional subjects the branch of Civil Engineering at almost all engineering institutes/colleges at the undergraduate level. It is also one of the specializations for post-graduate level studies. It is, by now, well proven that the geospatial technology play crucial role in water resources assessment, planning and management. However, the young minds (graduate and post-graduate students) are just being trained for typical hydrology using traditional means and approaches. The advancement and potential of geospatial technology has drawn the attention of academician, and it has been started as a subject mostly at the post-graduate courses. Recently, some of the institutions have started courses on geoinformatics at the graduate level. However, the hydrology and geospatial technology are generally taught as two separate subjects under different course at different levels mostly under the broad subject of Civil Engineering. The present paper emphasis on needs and ways of updating Civil Engineering course curriculum by focusing on incorporation of applications of geospatial technology in hydrology as regular subject.This contribution has been peer-reviewed. https://doi.org/10.5194/isprs-archives-XLII-5-111-2018 | © Authors 2018. CC BY 4.0 License.

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“…Remote sensing data have been used in water resource studies to estimate rainfall, evapotranspiration (ET), soil moisture [1], runoff, floods, droughts, snow water equivalent [2], and irrigation [3]. Apart from providing crucial information at the global scale, remote sensing can also be used as a proxy to the observed data in data-scarce regions.…”

Section: Introductionmentioning

confidence: 99%

Deriving the Reservoir Conditions for Better Water Resource Management Using Satellite-Based Earth Observations in the Lower Mekong River Basin

Ali

Sridhar

2019

Remote Sensing

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The Mekong River basin supported a large population and ecosystem with abundant water and nutrient supply. However, the impoundments in the river can substantially alter the flow downstream and its timing. Using limited observations, this study demonstrated an approach to derive dam characteristics, including storage and flow rate, from remote-sensing-based data. Global Reservoir and Lake Monitor (GRLM), River-Lake Hydrology (RLH), and ICESat-GLAS, which generated altimetry from Jason series and inundation areas from Landsat 8, were used to estimate the reservoir surface area and change in storage over time. The inflow simulated by the variable infiltration capacity (VIC) model from 2008 to 2016 and the reservoir storage change were used in the mass balance equation to calculate outflows for three dams in the basin. Estimated reservoir total storage closely resembled the observed data, with a Nash-Sutcliffe efficiency and coefficient of determination more than 0.90 and 0.95, respectively. An average decrease of 55% in outflows was estimated during the wet season and an increase of up to 94% in the dry season for the Lam Pao. The estimated decrease in outflows during the wet season was 70% and 60% for Sirindhorn and Ubol Ratana, respectively, along with a 36% increase in the dry season for Sirindhorn. Basin-wide demand for evapotranspiration, about 935 mm, implicitly matched with the annual water diversion from 1000 to 2300 million m3. From the storage–discharge rating curves, minimum storage was also evident in the monsoon season (June–July), and it reached the highest in November. This study demonstrated the utility of remote sensing products to assess the impacts of dams on flows in the Mekong River basin.

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Remote Sensing Applications to Water Resources

Cited by 17 publications

References 98 publications

Global Satellite-Based ET Products for the Local Level Irrigation Management: An Application of Irrigation Performance Assessment in the Sugarbelt of Swaziland

Global Satellite-Based ET Products for the Local Level Irrigation Management: An Application of Irrigation Performance Assessment in the Sugarbelt of Swaziland

Importance of Incorporation of Geospatial Technology Applications in Water Resources at Graduate and Post-Graduate Courses of Civil Engineering

Deriving the Reservoir Conditions for Better Water Resource Management Using Satellite-Based Earth Observations in the Lower Mekong River Basin

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