Short answer

When designing landscapes or managing water resources, consider the specific hydrological impacts of different plant species, particularly non-native ones, as they can substantially alter water availability.

Field: Resource Management
Source: ScholarSpace (University of Hawaii at Manoa) (2010)
Method: Field measurement and hydrological modeling
Evidence: Strong effect

Different non-native tree species exhibit varying capacities for canopy interception, significantly impacting the amount of rainfall that reaches the ground and subsequently contributes to water resources. This resource management research insight is drawn from a 2010 study published in ScholarSpace (University of Hawaii at Manoa). Using Field measurement and hydrological modeling, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing landscapes or managing water resources, consider the specific hydrological impacts of different plant species, particularly non-native ones, as they can substantially alter water availability.

Study

Resource ManagementHigh ImpactStrong effect

Non-native tree species can reduce water availability by up to 38% through increased canopy interception.

ScholarSpace (University of Hawaii at Manoa) · 2010

Key Findings

01Canopy interception losses varied significantly among non-native tree species, ranging from 18% to 38% of gross rainfall.
02Strawberry guava exhibited the highest stemflow, while a mixed species canopy had the lowest stemflow.
03Groundwater recharge was estimated at 31% of gross rainfall.
04Streamflow decline was attributed to groundwater pumping, decreasing rainfall, and increasing evapotranspiration.
05Air temperatures on O'ahu have shown a significant increasing trend, with minimum temperatures rising faster than global averages.

Application

Design takeaway

How to apply

When planning urban green spaces, agricultural projects, or watershed restoration, analyze the potential water interception of proposed plant species and consider their invasive potential.

Project actions

01When researching plant species for a design, look for data on their water interception rates.
02Consider the local climate and water availability when choosing vegetation for a project.

Method & Evidence

AimTo quantify the canopy interception losses of different non-native tree species and assess their impact on water availability in a watershed.

MethodField measurement and hydrological modeling

ProcedureRainfall, throughfall, and stemflow were measured for three non-native tree species over a four-year period. A hydrological model (DHSVM) was used to simulate water processes and assess the impact of land use and climate changes on streamflow and groundwater recharge.

ContextWatershed hydrology and vegetation management

Variables

IV["Type of non-native tree species","Land use/land cover","Climate variables (rainfall, temperature)"]

DV["Canopy interception (throughfall, stemflow)","Streamflow","Groundwater recharge","Evapotranspiration"]

CV["Measurement period (2006-2010 for specific measurements)","Location (Makaha watershed)","Hydrological model parameters"]

Strengths & Limitations

Strengths

+Combines field measurements with sophisticated hydrological modeling.
+Addresses the complex interplay of land use, climate, and hydrology.

Limitations

The specific water interception rates may vary depending on local rainfall patterns, tree age, and health.

Reliability & validity

The use of a validated hydrological model (DHSVM) and direct field measurements enhances the reliability and validity of the findings regarding hydrological processes. However, the generalization of specific interception percentages may be limited by site-specific conditions.

Think critically

How might the long-term effects of climate change, such as altered rainfall patterns and increased temperatures, exacerbate the water resource challenges posed by invasive tree species?

Design Principles

"Vegetation selection and management directly influence water resource availability; prioritize species with lower interception rates in water-scarce environments."

Understanding these interception differences is crucial for water resource management, especially in regions facing water scarcity or planning reforestation efforts. Designers and resource managers can use this information to select species that minimize water loss or to estimate the hydrological impact of existing vegetation.

What This Means for Your Design

Some introduced trees drink up a lot of rainwater before it can reach the ground, which can cause water shortages.

How to use in your project

1.Use this research to justify the selection of specific plant species based on their water-saving properties or to explain the hydrological consequences of existing vegetation in your design context.

Add to My Project

Quick Cite

Paragraph starter

Research indicates that non-native tree species can significantly impact water resource availability through canopy interception, with losses ranging from 18% to 38% of gross rainfall, highlighting the importance of careful vegetation selection in design projects aimed at water conservation.

Source

ScholarSpace (University of Hawaii at Manoa)

The response of different hydrologic processes under changing land use/land cover and climate in Makaha watershed, O'ahu

journal · 2010

View source

Questions About This Research

What does the research say about non-native tree species can reduce water availability by up to 38% through increased canopy interception?: When designing landscapes or managing water resources, consider the specific hydrological impacts of different plant species, particularly non-native ones, as they can substantially alter water availability. Evidence: ScholarSpace (University of Hawaii at Manoa) (2010).
Why does "Non-native tree species can reduce water availability by up to 38% through increased canopy interception." matter for design?: Understanding these interception differences is crucial for water resource management, especially in regions facing water scarcity or planning reforestation efforts. Designers and resource managers can use this information to select species that minimize water loss or to estimate the hydrological impact of existing vegetation.
How can designers apply this research?: When designing landscapes or managing water resources, consider the specific hydrological impacts of different plant species, particularly non-native ones, as they can substantially alter water availability.
What were the main findings?: Canopy interception losses varied significantly among non-native tree species, ranging from 18% to 38% of gross rainfall.. Strawberry guava exhibited the highest stemflow, while a mixed species canopy had the lowest stemflow.. Groundwater recharge was estimated at 31% of gross rainfall.. Streamflow decline was attributed to groundwater pumping, decreasing rainfall, and increasing evapotranspiration.
What research method was used?: Field measurement and hydrological modeling.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2010 journal from ScholarSpace (University of Hawaii at Manoa).
What should I do differently in my next project?: When planning urban green spaces, agricultural projects, or watershed restoration, analyze the potential water interception of proposed plant species and consider their invasive potential.
What are the limitations?: The study focused on a specific watershed and a limited number of non-native species; findings may not be universally applicable without further research.