
Eloise KendyThe Nature Conservancy · Freshwater
Eloise Kendy
Doctor of Philosophy
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Publications (44)
Abstract Unmanned Aerial Vehicles (UAVs) offer new opportunities for accurate, repeatable vegetation assessments, which are needed to adaptively manage restored habitat. We used UAVs, ground surveys, and satellite imagery to evaluate vegetation metrics for three riparian restoration sites along the Colorado River in Mexico and we compared the data...
The macrotidal Colorado River Delta at the northern end of the Gulf of California in Mexico is hydrologically complex. We review historical accounts, data, field notes and photographs to evaluate the hydrological processes active on the delta prior to the advent of upstream dams. We also employ satellite imagery as well as recent LIDAR data to illu...
Water-management infrastructure, such as dams, diversions, and levees, provides important benefits to society, including energy, flood management, and water supply, but this infrastructure is a primary cause of the decline of freshwater ecosystems and the services they provide. Due to these declines, recent attention has focused on improving the en...
In the decade since the Brisbane Declaration (2007) called upon governments and other decision makers to integrate environmental flows into water management, practitioners have continued to seek ways to expand implementation of flow restoration or protection. The science and practice of environmental flow assessment have evolved accordingly, genera...
A decade ago, scientists and practitioners working in environmental water management
crystallized the progress and direction of environmental flows science, practice, and
policy in The Brisbane Declaration and Global Action Agenda (2007), during the 10th
International Riversymposium and International Environmental Flows Conference held in
Brisbane,...
A decade ago, scientists and practitioners working in environmental water management crystallized the progress and direction of environmental flows science, practice, and policy in The Brisbane Declaration and Global Action Agenda (2007), during the 10th International Riversymposium and International Environmental Flows Conference held in Brisbane,...
Across the western United States, environmental water transaction programs (EWTPs) restore environmental flows by acquiring water rights and incentivizing changes in water management. These programs have evolved over several decades, expanding from relatively simple two-party transactions to multiobjective deals that simultaneously benefit the envi...
Environmental flows have become important tools for restoring rivers and associated riparian ecosystems (Arthington, 2012; Glenn et al., 2017). In March 2014, the United States and Mexico initiated a bold effort in restoration, delivering from Morelos Dam a “pulse flow” of water into the Colorado River in its delta for the purpose of learning about...
Minute 319, a binational agreement between the United States and México, authorized environmental flows into the Colorado River Delta, including a high-profile pulse flow delivered in March through May 2014. Reforming water management policy to secure future delivery of environmental flows to the delta hinges on demonstrating the feasibility of del...
Increasing pressure on water availability in the Colorado River Basin due to a long and severe drought, water over-allocation, increasing water demands, and a warming climate point toward the need to optimize use of water to meet all goals, including environmental restoration. In this paper, we analyze the hydrologic response of the Colorado River...
The term "environmental flows" is now widely used to reflect the hydrological regime required to sustain freshwater and estuarine ecosystems, and the human livelihoods and well-being that depend on them. The definition suggests a central role for ecohydrological science to help determine a required flow regime for a target ecosystem condition. Inde...
Environmental flows are gaining broad recognition across
the United States, and the underlying science is sufficiently
developed to support regional planning and policy
applications. This report explores how six states and three
interstate river basins are effectively developing and
applying regionalized environmental flow criteria to water
resourc...
Environmental flows are the seasonally variable streamflows and water levels needed to maintain healthy freshwater and estuarine ecosystems while providing for hydropower generation, flood management, water withdrawals, and land-use changes. Over the past decade, many states, provinces, and countries have adopted policies requiring the provision of...
China has been going through a remarkable economic expansion and transformation since the late 1970s with an average annual growth rate of nearly 10%. In a provocative book published in 1995, the American agricultural expert and environmentalist Lester Brown
pointed to the fact that China has less than 10% of the world’s farmland but must feed more...
1. The flow regime is a primary determinant of the structure and function of aquatic and riparian ecosystems for streams and rivers. Hydrologic alteration has impaired riverine ecosystems on a global scale, and the pace and intensity of human development greatly exceeds the ability of scientists to assess the effects on a river‐by‐river basis. Curr...
Riverbank filtration (RBF) is broadly used in Europe and parts of the US to naturally prefilter river water for municipal supply. RBF systems are designed to optimize clean water yield. In RBF, water pretreatment is achieved by pumping water through an aquifer. Pumping water from a shallow alluvial aquifer adjacent to a river can lower the water ta...
Ground water pumping from aquifer systems that are hydraulically connected to streams depletes streamflow. The amplitude and timing of stream depletion depend on the stream depletion factor (SDF(i)) of the pumping wells, which is a function of aquifer hydraulic characteristics and the distance from the wells to the stream. Wells located at differen...
China, like many countries, is experiencing an unprecedented rate of urbanization. Urbanization is usually thought to intensify inter-sectoral water conflicts. In contrast, this paper considers urbanization as part of a viable solution to the problem. By evaluating water consumption, or depletion, in terms of actual evaporation and transpiration, a...
Agricultural systems depend fundamentally on ecological processes and on the services provided by many ecosystems. Agricultural management during the last century has caused widescale changes in land cover, watercourses, and aquifers, contributing to ecosystem degradation and undermining the processes that support ecosystems and the provision of...
In surface-water-irrigated western valleys, groundwater discharge from excess irrigation sustains winter streamflow at levels that exceed natural flows. This unnatural condition has persisted for so long that hydrologists, water managers, and water users consider it to be normal. Changing land uses and irrigation practices complicate efforts to man...
Effective management of limited water resources in the North China Plain requires reliable calculation of historical groundwater balances at local, sub-watershed scales. These calculations typically are hindered by poorly constrained recharge estimates. Using a simple soil-water balance model, we independently calculated annual recharge from irriga...
Surface energy fluxes above the canopies of well-irrigated winter wheat and maize in the North China Plain were
measured by the Bowen-ratio energy balance technique in 1999–2000. Seasonal variation of the ratio of latent heat
flux �E to available energy Rn � G showed that the ratio of �E to Rn � G exceeded 83% when leaf area index (LAI)
varied from...
Because water shortages limit development in many parts of the world, a systematic approach is needed to use water more productively. To address this need, Molden and Sakthivadivel [Water Resour. Dev. 15 (1999) 55-71] developed a water-accounting procedure for analyzing water use patterns and tradeoffs between users. Their procedure treats groundwa...
In the North China Plain (NCP), excessive groundwater pumping is a serious problem. In this study, different groundwater irrigation schedules were applied. A simple soil water balance approach was introduced to evaluate crop evapotranspiration (ET) and water use efficiency (WUE). Under normal irrigation scheduling, groundwater mining occurs at a ra...
Rapidly depleting unconfined aquifers are the primary source of water for irrigation on the North China Plain. Yet, despite its critical importance, groundwater recharge to the Plain remains an enigma. We introduce a one-dimensional soil-water-balance model to estimate precipitation- and irrigation-generated areal recharge from commonly available c...
"The North China Plain, 3200,000 km in extent, is China's most important center of agricultural production and home to more than 200 million people. Through extensive irrigation, the region produces more than 50 percent of the nation's wheat and 33 percent of its maize, making it critical to national food self-sufficiency. Yet, on the North China P...
"Competing demands on limited water resources have resulted in persistent water shortages for the North China Plain. Despite years of effort to mitigate the problem, ground-water levels continue to decline steadily. A quantitative analysis of hydrologic changes affecting Luancheng County, Hebei Province, from 1949 to 2000 identifies crop evapotrans...
Thesis (Ph. D.)--Cornell University, Aug. 2002. Includes bibliographical references.
The North China Plain (NCP) is one of China's most important social, economic, and agricultural regions. Currently, the Plain has 17,950 thousand ha of cultivated land, 71.1 percent of which is irrigated, consuming more than 70 percent of the total water supply. Increasing water demands associated with rapid urban and industrial development and exp...
Typescript. Thesis (M.S.)--University of Wisconsin--Madison, 1986. Includes bibliographical references (leaves 145-151).