4
Multiscale Hydrologic Remote Sensing: Perspectives and Applications
and ice sheets. The interactions between water and energy fluxes will be emphasized
in the context of ET and precipitation. Due to limitations of space, within this book,
the main focus of the current research in the context of multiscale hydrologic remote
sensing may be classified into five topical areas as follows:
1. Topical area I: local-scale hydrologic remote sensing. The interactions
among surface ET, overland flow, infiltration, groundwater, and coastal
storm surge may be monitored by several instruments and sensors collectively or independently. They include ground penetration radar, local sensors, and sensor networks for assessing storm impact on the bathymetry
based on radar image sequences and remote sensing satellite images for
ET estimation and validation. These local-scale hydrologic remote sensing
practices will be emphasized in the first part of this book. A few applications and case studies from Chapters 2 to 5 may further demonstrate a contemporary coverage of these issues in association with both terrestrial and
coastal environments.
2. Topical area II: urban-scale hydrologic remote sensing. At the urban scale,
spatiotemporal interactions among soil moisture, vegetation cover, and ET
due to urbanization effects in association with increasing impervious areas
and altered hydrologic cycle may be of interest to explore. This effort may
lead to the derivation of a composite drought indicator. These advances are
specifically addressed in Part III of this book. A few applications and case
studies from Chapters 6 and 7 may demonstrate a contemporary coverage
of these issues.
3. Topical area III: watershed-scale hydrologic remote sensing. At the watershed scale, snowmelt, runoff, and inundation associated with the complexity of land management policies are highly interrelated with each other.
Watershed modeling in combination with these hydrologic measurements is
described to entail how remote sensing products can be validated and integrated with modeling processes in Part III of this book. A few applications
and case studies from Chapters 8 to 11 may demonstrate a contemporary
coverage of these issues.
4. Topical area IV: regional-scale hydrologic remote sensing. From local
to urban, to watershed, and to regional scales, the rainfall and hurricane
im pacts come to pose a number of water problems. Ground-based radar
stations may offer intensive information about the intensity and spatial variability of rainfall region-wide. Monitoring rainfall with ground-based radar
stations may be greatly improved by using integrative hardware, sensors,
algorithms, and models. The spaceborne water vapor differential absorption lidar may precisely capture the dynamic changes of hurricane and
storm impacts. From combined spaceborne radars and microwave radiometers, the nature of precipitation can be further illuminated. These advances
are specifically addressed in Part IV of this book. A few applications and
case studies from Chapters 12 to 15 may demonstrate a contemporary coverage of these issues.
Multiscale Hydrologic Remote Sensing: Perspectives and Applications
and ice sheets. The interactions between water and energy fluxes will be emphasized
in the context of ET and precipitation. Due to limitations of space, within this book,
the main focus of the current research in the context of multiscale hydrologic remote
sensing may be classified into five topical areas as follows:
1. Topical area I: local-scale hydrologic remote sensing. The interactions
among surface ET, overland flow, infiltration, groundwater, and coastal
storm surge may be monitored by several instruments and sensors collectively or independently. They include ground penetration radar, local sensors, and sensor networks for assessing storm impact on the bathymetry
based on radar image sequences and remote sensing satellite images for
ET estimation and validation. These local-scale hydrologic remote sensing
practices will be emphasized in the first part of this book. A few applications and case studies from Chapters 2 to 5 may further demonstrate a contemporary coverage of these issues in association with both terrestrial and
coastal environments.
2. Topical area II: urban-scale hydrologic remote sensing. At the urban scale,
spatiotemporal interactions among soil moisture, vegetation cover, and ET
due to urbanization effects in association with increasing impervious areas
and altered hydrologic cycle may be of interest to explore. This effort may
lead to the derivation of a composite drought indicator. These advances are
specifically addressed in Part III of this book. A few applications and case
studies from Chapters 6 and 7 may demonstrate a contemporary coverage
of these issues.
3. Topical area III: watershed-scale hydrologic remote sensing. At the watershed scale, snowmelt, runoff, and inundation associated with the complexity of land management policies are highly interrelated with each other.
Watershed modeling in combination with these hydrologic measurements is
described to entail how remote sensing products can be validated and integrated with modeling processes in Part III of this book. A few applications
and case studies from Chapters 8 to 11 may demonstrate a contemporary
coverage of these issues.
4. Topical area IV: regional-scale hydrologic remote sensing. From local
to urban, to watershed, and to regional scales, the rainfall and hurricane
im pacts come to pose a number of water problems. Ground-based radar
stations may offer intensive information about the intensity and spatial variability of rainfall region-wide. Monitoring rainfall with ground-based radar
stations may be greatly improved by using integrative hardware, sensors,
algorithms, and models. The spaceborne water vapor differential absorption lidar may precisely capture the dynamic changes of hurricane and
storm impacts. From combined spaceborne radars and microwave radiometers, the nature of precipitation can be further illuminated. These advances
are specifically addressed in Part IV of this book. A few applications and
case studies from Chapters 12 to 15 may demonstrate a contemporary coverage of these issues.