عنوان

Integrating Gravimetry Data with Thermal Infra-Red Data from Satellites to Improve Efficiency of Operational Irrigation Advisory in South Asia

Number

TL56722

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Integrating Gravimetry Data with Thermal Infra-Red Data from Satellites to Improve Efficiency of Operational Irrigation Advisory in South Asia

General Material Designation

[Thesis]

First Statement of Responsibility

Bose, Indira

Subsequent Statement of Responsibility

Hossain, Faisal

Name of Publisher, Distributor, etc.

University of Washington

Date of Publication, Distribution, etc.

2020

Text of Note

79 p.

Dissertation or thesis details and type of degree

Master's

Body granting the degree

University of Washington

Text preceding or following the note

2020

Text of Note

The rapid decline of groundwater resources in South Asia due to excessive irrigation during dry season requires awareness of optimal on-field water allocation requirements that is now being provided to farmer cellphones through an operational Irrigation Advisory System (IAS). To minimize the cost of sending such irrigation advisory texts to farmers while maximizing impact of IAS on groundwater sustainability we integrated Gravity Recovery and Climate Experiment (GRACE) data with Landsat Thermal Infrared (TIR) Imagery to target regions in greater need of the IAS service. We demonstrated the concept of an improved IAS with the integration of GRACE and Landsat TIR data over eight irrigation districts of the Ganges and Indus basins. The Surface Energy Balance Algorithm for Land (SEBAL) was used to monitor on-field water consumption (evapotranspiration-ET) over cropped areas using Landsat TIR data at plot-scale spatial resolution. Comparison of SEBAL ET with crop water demand from Penman-Monteith (FAO56) technique quantified the extent of over-irrigation at the plot scale and provided a tangible pathway to micro-target the IAS service only to farmers with the largest groundwater use footprint, thereby maximizing the efficiency of the IAS service. Our results suggested that an operational IAS that integrates GRACE and Landsat TIR data on average can save about 85% (80 million m3) of groundwater per dry season for irrigation districts of Northern India and 87% (or 150 million m3) per year for irrigation districts of Eastern Pakistan. Our proposed enhanced IAS will also allow continuous monitoring of farmer behavioral change in reducing over-irrigation and long-term impact on groundwater resources with need-based irrigation practices via follow up assessment of GRACE TWS (after dry season) and TIR data (during dry season).

Subject Term

Agriculture

Subject Term

Civil engineering

Subject Term

Remote sensing

Subject Term

South Asian studies

Bose, Indira

Hossain, Faisal

University of Washington

Electronic name

p

[Thesis]

276903

a

Y