Comparison of water resources management between China and the United States

Geography and sustainability, Год журнала: 2020, Номер 1(2), С. 98 - 108

Опубликована: Май 6, 2020

As the world's top two economies, United States (U.S.) and China face a number of similar water resources problems. Yet, few studies have been done to systematically compare policies approaches on management between U.S. This study compares in areas national authority, supply, quality, ecosystem use draw lessons learned shed light China, U.S., rest world. The from comparison include six aspects. 1) New paradigms people-water harmony water-saving society are urgently needed address pressing crisis achieve Nations Sustainable Development Goals (UN SDGs). 2) A comprehensive, consistent, forward-looking policy is necessary sustainable resources. 3) Empowerment river basin commissions with comprehensive authority over integrative air, land, water, biological could significantly enhance benefits effectiveness economic development environmental protection. 4) Expansion exchange through market mechanisms among users promotes efficient beneficial uses. 5) Use for services should be an integral part management. has set up blueprint achieving ecological civilization; maintaining appropriate amounts flow rivers lakes maintenance wildlife fisheries ecosystems institutionalized as this strategy well. 6) By sharing their rich experiences management, development, protection other countries, can help world global human-water UN SDGs.

Язык: Английский

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The natural flow regime: A master variable for maintaining river ecosystem health

Ecohydrology, Год журнала: 2020, Номер 13(8)

Опубликована: Авг. 28, 2020

Abstract River health is sustained by time‐based variation in their flows, and the maintenance of natural flow regime essential for keeping rivers healthy. However, dynamism now stands altered changing climate, omnipresent regulation river flows throughout world has severely impacted health. It well documented that harnessing altering streams comes at a huge cost. Numerous have stopped supporting socially economically important native species or sustain vibrant ecosystems offer valuable goods services. The alteration led to collapse many healthy resilient world. Therefore, ensure appropriate naturalized regimes riverine organisms sustainable nexus between energy demand, water requirements more understanding required study consequences triggered climate change anthropogenic interventions. Moreover, conservation management practices must be firmly based on scientific principles restore integrity ecosystems. current approaches often fail take into consideration basic fundamental principle ecosystem largely determined dynamic character regimes. In this synthesis, we try explain how an requirement maintaining

Язык: Английский

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Climate and land-use changes interact to drive long-term reorganization of riverine fish communities globally

Proceedings of the National Academy of Sciences, Год журнала: 2021, Номер 118(27)

Опубликована: Июнь 21, 2021

As climate change unfolds, changes in population dynamics and species distribution ranges are expected to fundamentally reshuffle communities worldwide. Yet, a comprehensive understanding of the mechanisms extent community reorganization remains elusive. This is particularly true riverine systems, which simultaneously exposed changing temperature streamflow, where land-use continues be major driver biodiversity loss. Here, we use most compilation fish abundance time series date provide global synthesis climate- LU-induced effects on biota with respect thermal streamflow affinities. We demonstrate that increasingly dominated by thermophilic (warm-water) limnophilic (slow-water) species. Despite being consistent trends water observed over recent decades, these appear largely decoupled from each other show wide spatial variation. further reveal synergy among land use-related drivers, such thermophilization heightened more human-modified systems. Importantly, experience flow regimes approach or exceed their tolerance thresholds (high sensitivity), as well species-poor (low resilience), also display faster rates compositional change. research illustrates quantifying vulnerability systems requires broadening narrower focus integrative approaches account for spatially varying multifaceted sensitivity organisms interactive temperature, hydrology, anthropogenic changes.

Язык: Английский

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Facets and scales in river restoration: Nestedness and interdependence of hydrological, geomorphic, ecological, and biogeochemical processes

Journal of Environmental Management, Год журнала: 2020, Номер 265, С. 110288 - 110288

Опубликована: Май 7, 2020

Язык: Английский

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Designing flow regimes to support entire river ecosystems

Frontiers in Ecology and the Environment, Год журнала: 2021, Номер 19(6), С. 326 - 333

Опубликована: Май 3, 2021

Overcoming challenges of water scarcity necessitates creative flow management approaches that account for multiple, potentially competing needs plants and animals in river ecosystems. Mechanistic multispecies models can guide decision making by evaluating trade‐offs associated with regimes designed specific ecosystem outcomes before implementation. We investigated the cross‐ecosystem effects environmental to benefit focal groups riparian vegetation, fishes, invertebrates. The revealed among different designer narrow taxonomic targets, which some cases caused non‐target taxa become locally extirpated within short (decadal) timespans. By incorporating multiple frequencies – from intra‐annual‐scale pulses large decadal‐scale floods simulated natural regime enabled balanced, albeit smaller, population sizes across three components: 72% achieved regimes, on average. Although returning a may not be possible highly flow‐modified rivers, novel must incorporate diverse flood drought accommodate occasionally conflicting requirements at times.

Язык: Английский

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