Users' manual for the Hydroecological Integrity Assessment Process software (including the New Jersey Assessment Tools)

Henriksen, James A.; Heasley, John; Kennen, Jonathan G.; Nieswand, Steven P.

doi:10.3133/ofr20061093

Cited by 98 publications

(130 citation statements)

References 11 publications

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“…Results of the regression relation indicate that the observed and calculated mean annual daily flow values are near unity (n = 43, R 2 = 0.9385, p < 0.0001; Kennen and Riskin 2010). This result is consistent with metric-validation results previously published for all NJHAT metrics (see Henriksen et al 2006, Kennen et al 2007). …”

Section: Hydrologic Variablessupporting

confidence: 88%

“…A total of 163 hydrologic variables derived using NJHAT (Henriksen et al 2006) were evaluated for this study. Scatterplots were used to examine data distributions and to detect potential outliers in the hydrologic variables.…”

Section: Methodsmentioning

confidence: 99%

“…Using these index stations and the equations derived from MOVE1, hydrographs were generated for all of the ecological sampling sites for the study period of record, [2004][2005][2006]. Hydrographic data for daily mean flows were imported into the New Jersey Hydrologic Assessment Tool (NJHAT; Henriksen et al 2006), which is software developed to assist water resource professionals with characterizing the five major components of the flow regime (magnitude, frequency, duration, timing, and rate of change) which are considered to be important in shaping ecological processes in streams (Olden and Poff 2003, Henriksen et al 2006, Kennen et al 2007). Peak-flow data were not available, so only 163 (of 171) ecologically relevant hydrologic indices were generated.…”

Section: Hydrologic Attributesmentioning

confidence: 99%

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Effects of streamflow reductions on aquatic macroinvertebrates: linking groundwater withdrawals and assemblage response in southern New Jersey streams, USA

Kennen

Riskin

Charles

2014

Hydrological Sciences Journal

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A comprehensive hydro-ecological investigation was conducted to determine the ecological response of increased groundwater withdrawals from the Kirkwood-Cohansey aquifer system, an important source of water supply in southern New Jersey, USA. Collocated observations were made of aquatic-macroinvertebrate assemblages and stream hydrologic attributes to develop flow-ecology response relations. A sub-regional transient groundwater flow model (MODFLOW) was used to simulate three plausible high-stress groundwater-withdrawal scenarios which resulted in stream baseflow reductions of approximately 0.12, 0.20, and 0.26 m 3 s -1 . These reduction scenarios were used to construct flow-alteration ecological response models to evaluate aquaticmacroinvertebrate response to streamflow reduction. For example, flow-alteration ecological response models indicate that if groundwater withdrawals diminish mean annual streamflow from 1.1 to 0.6 m 3 s -1 , the abundance of intolerant taxa could be reduced by as much as 20%. These flow-alteration ecological response modelling results could be used by resource professionals to evaluate alternative water management strategies to determine maximum basin withdrawal rates that meet ongoing human water demand while protecting biological integrity.Key words hydro-ecology; streamflow alteration; aquatic macroinvertebrates; flow-ecology relations; groundwater model; MODFLOW; withdrawal scenarios Effets de la réduction des débits sur les macro-invertébrés aquatiques: relier les prélèvements d'eaux souterraines et la réponse des communautés dans les cours d'eaux du Sud du New Jersey, Etats-Unis Résumé Une enquête hydro-écologique globale a été menée pour déterminer la réponse écologique de l'augmentation des prélèvements d'eau souterraine de l'aquifère Kirkwood-Cohansey, une importante source d'approvisionnement en eau du Sud du New Jersey, Etats-Unis. Des observations co-localisées de communautés de macro-invertébrés aquatiques et d'attributs hydrologiques des cours d'eau ont été réalisées pour établir les relations de la réponse débit-écologie. Un modèle sous-régional transitoire de l'écoulement des eaux souterraines (MODFLOW) a été utilisé pour simuler trois scénarios plausibles de prélèvements importants des eaux souterraines qui ont abouti à une réduction du débit de base des cours d'eau de l'ordre de 0,12, 0,20 et 0,26 m3/s. Ces scénarios de réduction ont été utilisés pour élaborer des modèles de réponse écologique à l'altération du débit, pour évaluer la réponse des macro-invertébrés aquatiques à la réduction des débits. Par exemple, les modèles de réponse écologique à l'altération du débit indiquent que si les prélèvements d'eaux souterraines provoquent la diminution de l'écoulement annuel moyen de 1,1 m3/s à 0,6 m3/s, l'abondance des taxons intolérants pourrait être réduite de près de 20%. Ces résultats de la modélisation de la réponse écologique pourraient être utilisés par les professionnels des ressources pour évaluer des stratégies alternatives de gestion de l'eau afin de dé...

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Section: Hydrologic Variablessupporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Section: Hydrologic Attributesmentioning

confidence: 99%

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Effects of streamflow reductions on aquatic macroinvertebrates: linking groundwater withdrawals and assemblage response in southern New Jersey streams, USA

Kennen

Riskin

Charles

2014

Hydrological Sciences Journal

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“…Flow regime classification is achieved commonly on the basis of stream flow characteristics using hydrologic indices with five stream flow components; magnitude, frequency, duration, timing, and rate of changes of flows [25,26]. In most of the studies, the hydrological indices of the rivers are calculated from a time series data recorded at gauging stations [27].…”

Section: Introductionmentioning

confidence: 99%

Flow Regime Classification and Hydrological Characterization: A Case Study of Ethiopian Rivers

Berhanu¹,

Seleshi²,

Demisse³

et al. 2015

Water

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Abstract:The spatiotemporal variability of a stream flow due to the complex interaction of catchment attributes and rainfall induce complexity in hydrology. Researchers have been trying to address this complexity with a number of approaches; river flow regime is one of them. The flow regime can be quantified by means of hydrological indices characterizing five components: magnitude, frequency, duration, timing, and rate of change of flow. Similarly, this study aimed to understand the flow variability of Ethiopian Rivers using the observed daily flow data from 208 gauging stations in the country. With this process, the Hierarchical Ward Clustering method was implemented to group the streams into three flow regimes (1) ephemeral, (2) intermittent, and (3) perennial. Principal component analysis (PCA) is also applied as the second multivariate analysis tool to identify dominant hydrological indices that cause the variability in the streams. The mean flow per unit catchment area (QmAR) and Base flow index (BFI) show an incremental trend with ephemeral, intermittent and perennial streams. Whereas the number of mean zero flow days ratio (ZFI) and coefficient of variation (CV) show a decreasing trend with ephemeral to perennial flow regimes. Finally, the streams in the three flow regimes were characterized with the mean and standard deviation of the hydrological variables and the shape, slope, and scale of the flow duration curve. Results of this study are the basis for further understanding of the ecohydrological processes of the river basins in Ethiopia. OPEN ACCESSWater 2015, 7 3150

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“…A general approach for hydrological alteration assessment is based on the analysis of these metrics, which are compared before and after a river has been altered by human activities (Richter et al, 1996). This methodology, as well as other methods (Fernández Yuste et al, 2012;Henriksen et al, 2006;Martínez Santa-María and Fernández Yuste, 2008) generally used to analyse the status variations within a system over time, or to compare an altered system to a reference system, are based on streamflow data, which are referred to as un-impacted and impacted conditions. The method is simple to implement when streamflow data have been measured at the same river section before and after the change in the hydrological regime.…”

Section: Introductionmentioning

confidence: 99%

Assessing flow regime alterations in a temporary river – the River Celone case study

Girolamo

Porto

Pappagallo

et al. 2015

Journal of Hydrology and Hydromechanics

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Abstract:In this paper, we present an approach to evaluate the hydrological alterations of a temporary river. In these rivers, it is expected that anthropogenic pressures largely modify low-flow components of the flow regime with consequences for aquatic habitat and diversity in invertebrate species. First, by using a simple hydrological index (IARI) river segments of the Celone stream (southern Italy) whose hydrological regime is significantly influenced by anthropogenic activities have been identified. Hydrological alteration has been further classified through the analysis of two metrics: the degree (M f ) and the predictability of dry flow conditions (Sd 6 ). Measured streamflow data were used to calculate the metrics in present conditions (impacted). Given the lack of data from pristine conditions, simulated streamflow time series were used to calculate the metrics in reference conditions. The Soil and Water Assessment Tool (SWAT) model was used to estimate daily natural streamflow. Hydrological alterations associated with water abstractions, point discharges and the presence of a reservoir were assessed by comparing the metrics (M f , Sd 6 ) before and after the impacts. The results show that the hydrological regime of the river segment located in the upper part of the basin is slightly altered, while the regime of the river segment downstream of the reservoir is heavily altered. This approach is intended for use with ecological metrics in defining the water quality status and in planning streamflow management activities.

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