Erratum to: Integrated Groundwater Management

Abstract

7 Conjunctive use (CU) of surface and groundwater storage and supplies is 8 essential for integrated water management. It is also a key strategy for 9 supporting groundwater-dependent ecosystems, and for adapting water systems 10 to future climate and land use changes. CU has become increasingly sophisti-11 cated and integrated with other innovative and traditional water management 12 techniques, such as water transfers, water reuse, demand management, and 13 aquifer remediation. CU adds value for society (increasing average yield and 14 reliability) but can also induce costs to some parties, such as damaging senior 15 water rights of surface water users when pumping from the aquifer reduces 16 streamflow. Groundwater overexploitation also can produce a host of undesir-17 able economic and environmental impacts. Successful CU implementation typi-18 cally requires changes in infrastructure and operations, but also changes in 19 institutions and institutional arrangements to offset potential third party costs 20 and protect ecosystems. This chapter analyses first the management and eco-21 nomic implications of CU, addressing advantages, costs and limitations, as well 22 as the potential contribution of economic instruments to the conjunctive opera-23 tion of groundwater and surface storage and resources. CU management models 24 are then classified according to the CU problem, their formulation and solution 25 techniques. Different applications of hydroeconomic models are reviewed in a 26 wide range of CU problems. A few applications are discussed more in-depth, 27 using cases from California and Spain. Then, we discuss the relevance of these 28 models in decision-making, and the policy and institutional implications. 29 Finally, we address limitations and challenges, and suggest future directions.