Conjunctive Management

riverrock

Conjunctive Water management is a fairly new concept to the Central Platte NRD and to the state of Nebraska.  Surface water and groundwater typically have a natural hydrologic connection, so managing them together utilizes that connection to improve the overall reliability and availability of water resources.  It also minimizes impacts to stream flow and to groundwater levels.

Conjunctive management utilizes or stores excess surface water when it’s available and relies on groundwater during dry periods.  It can also change the timing and location of water, so it can be used more efficiently.

The Dawson County Canals within the CPNRD are examples of conjunctive management.  CPNRD made improvements to the Cozad Canal, Thirty Mile Canal, and Southside Canal through complete rehabilitation of each canal.  Results have shown enhanced stream flows to the Platte River, reduced consumptive uses of water, groundwater recharge, and enhanced wildlife habitat.

This approach helps to satisfy the endangered species requirements of the Platte River Recovery Implementation Program between the states of Nebraska, Colorado, Wyoming; and the U.S. Department of Interior. It also helps meet the requirements of LB 962 to return the Platte River to its 1997 level of use determined to be 3,400 acre/feet (AF); which will also help CPNRD get closer to a fully appropriated status.  Together, the three canals have the potential to provide up to 40,000 AF of water savings annually.

The partnerships between the CPNRD and the canal companies- Cozad Ditch, Thirty Mile Irrigation District, Southside Irrigation District- were fundamental in establishing conjunctive management of the water supplies; and showcases what can happen when groundwater and surface water users work toward a common goal.  For more information on the canal rehabs, visit our Re-Operation of Canals page.

Annual Report of Water Activities in the CPNRD     View Report

 

Management Agreements & Plans

DetailsCosponsors/Partners
Basin-Wide Management Plan

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The purpose of the Basin-Wide Plan for the Joint Integrated Water Resources Management of Overappropriated Portions of the Platte River Basin, Nebraska, is to meet the requirements of Statute 46-715 for those portions of the Platte River Basin upstream of the Kearney Canal Diversion designated as overappropriated by the NE Dept. of Natural Resources (DNR) in 2004.
Central Platte NRD, North Platte NRD, South Platte NRD,
Twin Platte NRD,
Tri-Basin NRD, Nebraska Department of Natural Resources
Cooperative Hydrology Study (COHYST)

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When former Nebraska Gov. Ben Nelson and the governors of Wyoming and Colorado signed the Platte River Recovery Implementation Program (PRRIP) in 1997 with the U.S. Department of Interior, questions arose about its potential impacts on activities along the Platte. It became apparent that data wasn’t available to use in evaluating proposals. With the help from a Nebraska Environmental Trust (NET) grant, the NRD and a coalition of state and local agencies; water and environmental organizations started a hydrology study of the Platte Basin known as the Cooperative Hydrology Study (COHYST).

COHYST improves the understanding of the hydrological and geological conditions in the Basin. The goal of the study is to provide scientifically supportable databases, analyses and detailed computer groundwater models to more accurately identify and quantify the relationship between the Platte River and adjacent groundwater resource. The Study provides valuable information necessary to develop a plan to address "new depletions" to flows in the central stretch of the Platte River. The Study also assists Nebraska in several avenues: to meet its obligation under the PRRIP by helping analyze proposed activities, assists the NRDs along the Platte River in providing appropriate regulation and management, provides a basis to develop policy and procedures related to groundwater and surface water, and helps analyze other programs in Nebraska.

In 2013, the technical committee completed model calibration on three models and selected Mike McDonal to conduct an outside peer review. The Watershed Model (CROPSIM), the Surface Water Model (STELLA), and the Groundwater Model (MODFLOW) were integrated to simulate the hydrologic cycle. The simulation compares water budget fluxes to data-driven calibration targets. Woodward said after the peer review, the models will be ready to start using for water management decisions for projects like the percentage depletion maps, Conjunctive Water Management Study, and to determine the real effects of operating irrigation canals differently.
Initial Sponsors:

Central NE Public Power & Irrigation District;
Central Platte NRD,
Little Blue NRD,
North Platte NRD,
South Platte NRD,
Tri-Basin NRD,
Twin Platte NRD,
Upper Big Blue NRD;
NE Department of Natural Resources,
NE Game & Parks Commission,
NE Public Power District.

Current Partners:

Cities of Grand Island, North Platte, Scottsbluff; NE Audubon Society, Nebraska Farm Bureau, NE Water Resources Association,
NE Water Users,
Platte River Whooping Crane Trust
Groundwater Quantity Management Plan

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In 1987, the directors established the Groundwater Management Plan, with a phased program to implement such controls when they are needed. The maximum acceptable decline ranges from 10 feet in the eastern end of the District to 30 feet in portions of the western end of the district.

If the water table falls to 50% of that maximum decline (5 and 15 feet respectively for each of the range parameters), Phase II would go into effect for any area or areas affected, triggering mandatory reductions in irrigated acres and establishing spacing limits for new irrigation wells.

Further declines to 70%, 90% & 100% of the maximum acceptable decline will trigger Phase III, IV and V controls respectively, mandating additional cutbacks in irrigated acreage and increased spacing limits for new wells. Complete details of the controls are available in district publications. Because of the differences in the aquifer depth and conditions, it is conceivable that some areas could be in the higher phases while other areas may always be in Phase I.
Central Platte NRD
Rules & Regulations for Fully & Over-appropriated Areas

The NRD has authority to enforce the Rules & Regulations under the Nebraska Ground Water Management & Protection Act. The first Rules & Regs were adopted in 2006, with amendments in 2007, 2008, 2009, 2001, 2012 and 2013. Rules include: Area designation & boundaries, Definitions, Closure of Management Area, Variances & Offsets, Irrigation History, Certification of Irrigated Acres, Transfers, and Violations.
Central Platte NRD
Groundwater Quality Management Plan

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The Groundwater Quality Management Program is having a beneficial impact on the nitrate levels in groundwater. The program is undertaking a long-term solution for the District's widespread high groundwater nitrate-nitrogen problems. Until the Program was adopted, the nitrate level in the high nitrate Area of the district had increased at a rate of about 0.5 ppm (parts per million) per year to 19.24 ppm. High groundwater nitrates in some areas of the valley were first identified in 1961. The Board of Directors adopted the Groundwater Management Plan in July 1987 and became effective in August 1987.

At the end of the first crop year under the program, the average level dropped by 0.3 ppm and has continued to drop to 14.47 ppm in Fall of 2013. The plan uses a phased approach, with lesser restrictions in areas that are not high in nitrates with additional regulations applying to areas with higher nitrate concentrations in the groundwater.
Central Platte NRD
Integrated Management Plan (IMP)

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Central Platte NRD and the Nebraska Department of Natural Resources (NDNR) began working on the Integrated Management Plan for the NRD in 2005. The NRD began meeting with Stakeholders in December 2005 to begin educating them on the requirements set by DNR and the issues that would need to be considered in developing the Plan.

The members included both surface and groundwater interests such as irrigators, city utilities, power districts, economic development and banking representatives. In June 2006, the Group finished a draft plan including one goal and 11 objectives. Originally the Plan was to be in place within 3-5 years, however, an extension to complete the Plan set the deadline for 2009 to allow NRDs to wait for the basin-wide plans to be completed.

The IMP was approved in May of 2009 and the NRD also revised the Rules and Regulations to correlate with the requirements in the IMP. In 2010, the DNR held an open comment period for the annual review of the basin IMPs. On March 22, 2012 a revised IMP was adopted and became effective on May 21, 2012.
Central Platte NRD, Nebraska Department of Natural Resources
Platte Basin Habitat Conservation Coalition


Within the Platte River Basin, people and nature both depend on the life-supporting water course, marked by a gallery of trees and green fields filled with a variety of crops. Wildlife depends on the river's habitats to survive. The Platte Basin Habitat Enhancement Project (PBHEP) was established to provide an added solution to help landowners in Nebraska's Platte River Basin meet the region's water needs, for wildlife and for the state's valuable agricultural economy.

PBHEP hopes to accomplish this by helping landowners make transitions that can maintain economic health, while at the same time reduce depletions to the river. This can be accomplished by taking advantage of a variety of conservation projects. Landowners can choose easements or other projects that fit their operations best, using cost share dollars to ease the costs associated with the transition.
Central Platte NRD,
North Platte NRD,
South Platte NRD,
Tri-Basin NRD, Twin Platte NRD,
NE Dept. of Natural Resources,
NE Game & Parks Commission
Platte River Recovery Program

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The Platte River Recovery Implementation Program (PRRIP), also known as the Platte River Program, was developed by the federal government along with basin states of Nebraska, Colorado and Wyoming and signed in 2006. Local, state and federal government agencies are working with groups from throughout the basin to build a framework for a long-term Program that will satisfy Endangered Species Act (ESA) requirements for water users in the basin.

The first PRRIP increment, planned to last 13 years, includes completion of water projects expected to improve flows in the central Platte by an average of 130,000-150,000 acre-feet annually. A second Program element is the protection and maintenance of 10,000 acres of habitat during the first increment, ultimately working toward a 29,000-acre goal. The specifics of subsequent increments will be planned as more information is developed. Through an adaptive management process, the Program goals may be modified as appropriate.
U.S. Dept. of Interior-U.S. Fish & Wildlife Service, and the states of Nebraska, Colorado and Wyoming.
Platte River Conjunctive Management Study

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The Platte River Conjunctive Water Management study creates tools to better manage ground and surface water in the Central Platte Valley by collecting and evaluating data to develop a hydrologic budget. Some of the components included in the budget are rainfall, pumping, surface water applied, total evapotranspiration, recharge, runoff and acreage. The concept of conjunctive management is that surface and ground water resources are hydrologically interconnected, and decisions to improve the management of one can’t be made properly without considering the other. Hence management should consider surface and ground water as components of one resource.

CPNRD’s hydrologist provides technical assistance in the development and evaluation of conjunctive management scenarios for portions of Dawson and Buffalo counties in the central Platte Valley. The team is developing a conjunctive water resource management plan to optimize the availability of water to groundwater and surface water users who are within both the boundaries of the CPNRD and the area within which NPPD delivers natural flow and storage water for surface water irrigation systems. The plan will be consistent with Nebraska statutes regarding the management of integrated surface water and groundwater.
Central Platte NRD,
NE Department of Natural Resources,
Nebraska Public Power District,
The Flatwater Group
Long Range Implementation Plan

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The Central Platte NRD is required to prepare and adopt a long range implementation plan under the Nebraska Natural Resources District Act. Section 2-3277 of the Nebraska statutes requires each NRD to prepare and adopt five-year Long Range Implementation Plans and under Section 2-3278 to “prepare and adopt any individual project plans as it deems necessary to carry out projects approved by the district.”

This plan summarizes the planned district activities and includes projections of financial, manpower and land right needs of the district for the next five years, as well as a specific needs assessment upon which the NRD’s long range implementation plan is reviewed and updated.
Central Platte NRD
Master Plan

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All 23 Nebraska Natural Resources Districts have filed a Comprehensive Resources Plan (Master Plan) in accordance with state statutes (Section 2-3276). The same section also requires the NRD to update its master plan “as often as deemed necessary by the district, but in no event less often than once each ten years.” Section 2-3280 of the state statutes requires that “ no state funds shall be allocated or disbursed to a district unless that district has submitted its master plan...and until the disbursing agency has determined that such funds are for plans, facilities, works, and programs which are in conformance with the plans of the agency.”
Central Platte NRD