Water quality trend assessment in Jakarta: A rapidly growing Asian megacity

Luo, Pingping; Kang, Shuxin; Apip,; Zhou, Meimei; Lyu, Jing; Aisyah, Siti; Binaya, Mishra; Regmi, Ram Krishna; Nover, Daniel

doi:10.1371/journal.pone.0219009

Cited by 120 publications

(72 citation statements)

References 45 publications

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“…An apparent question that one would like to examine next is how V max has changed over last several decades in the SCS. This question is of great interest beyond the SST dependence, as it not only sheds light into the recent change of TC intensity climatology in the SCS but also helps validate modelling studies of TC intensity variability and consequences related to climate change in this region (Knutson et al ., ; ; Wang and Chan, ; Kamahori et al ., ; Murakami et al ., ; IPCC/AR5, ; Luo et al ., , , ; Tu and Chen, ).…”

Section: Resultsmentioning

confidence: 99%

Relationship between sea surface temperature and the maximum intensity of tropical cyclones affecting Vietnam's coastline

Thanh

Cuong²,

Hiền

et al. 2019

Intl Journal of Climatology

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Estimating an upper bound for tropical cyclone (TC) intensity in a given environment is important for TC intensity forecasts and risk management. While theoretical limits for the TC maximum potential intensity have been well examined in previous studies, the actual maximum intensity ( Vmax) that a TC attains in real atmospheric conditions varies from basin to basin and is subject to much more uncertainties. This study examines different empirical relationships between sea surface temperature (SST) and Vmax in the South China Sea that affect Vietnam's coastal region. Using different SST datasets and the TC intensity record from 1982 to 2016, it is shown that Vmax in this area increases slower than the typical linear or exponential function form found in previous studies. Such different dependence of Vmax on SST in the South China Sea is due to the narrow range of SST variation in this region, which is between 24 and 30°C as compared to the range of 15 and 30°C used in previous studies. An alternative functional form based on the natural logarithm of SST is then proposed, which captures better the characteristics of the actual TC maximum intensity in Vietnam's coastal region. Examination of the variability of Vmax also indicates an uptrend of the TC maximum intensity over last 30 years in the South China Sea, which has a potentially large effect on Vietnam's coastal region. This increase of Vmax is consistent with the warmer trend of the SST as projected in the Fifth Assessment by the Intergovernmental Panel on Climate Change (IPCC).

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Section: Resultsmentioning

confidence: 99%

Relationship between sea surface temperature and the maximum intensity of tropical cyclones affecting Vietnam's coastline

Thanh

Cuong²,

Hiền

et al. 2019

Intl Journal of Climatology

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“…Finally, the S statistic is normalized by means of the Z statistic (Luo et al, 2019), which is calculated using Equation ).

normalZ = ({, \begin{matrix} left \\ \frac{S - 1}{\sqrt{italicVAR ((), S)}}; if S > 0 \\ 0; if S = 0 \\ \frac{S + 1}{\sqrt{italicVAR ((), S)}}; if S < 0 \end{matrix}) .

…”

Section: Methodsmentioning

confidence: 99%

Stabilization of stage–discharge curves following the establishment of forest plantations: Implications for sediment production

Pizarro

García‐Chevesich

Pino

et al. 2020

River Research & Apps

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The Purapel watershed in central Chile has experienced drastic land‐use changes since the 1950s, beginning with the conversion of native forests to forest plantations. Controversy exists on the effects of reforestation on sediment production in watersheds. The temporal evolution of stage–discharge curves and sediment production was evaluated and correlated with historic sediment deposition at the Purapel watershed's main gauging station. Annual stage–discharge curves and the evolution of the stage–discharge relationship over time were developed. Trends were generated using the Mann‐Kendall statistical test, comparing results with the evolution of sediment downstream. Obtained results denote a positive and significant trend at flows greater than 90 m3 s−1 (Z = 2.77). This can be explained by major flows that deepen the bed, which is consistent with a significant and sustained decrease in channel width (Z = −2.51) and the production of sediments (Z = −2.49). Similarly, the average annual number of curves decreased from 1.7 to 1.4. This analysis supports the conclusion that sediment production from the Purapel watershed drastically decreased after the majority of forest plantations were established around 1990, with important implications on how to retain sediments on degraded slopes through large‐scale afforestation projects, as well as the necessary politics to make it happen.

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“…Moreover, along with land subsidence and sea level rise, existing elevation, high rainfall and low drainage capacity all together make Jakarta one of the highest flood risk cities in the world (Garschagen, Surtiari, & Harb, 2018). About 40% of Jakarta's area, especially in North Jakarta, is below sea level (Luo, et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Managing the Urban Environment of Jakarta, Indonesia

Edelman¹,

Gunawan²

2020

CUS

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This article brings the contemporary thinking and practice of Urban Environmental Management (UEM) to the solution of current environmental problems in Jakarta, Indonesia, which is both the largest city in Southeast Asia and the heart of the world's second largest urban agglomeration, Jabotadebek. Such cities face more immediate problems than those in the developed world and have fewer resources to deal with them. The study first considers the context of Indonesia, and then reviews issues of poverty alleviation, industry, transportation, energy, water, sewage and sanitation, and finance. Finally, it proposes a 5-year plan to help alleviate the urban environmental problems of the city utilizing a real-world database and a limited budget.

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Water quality trend assessment in Jakarta: A rapidly growing Asian megacity

Cited by 120 publications

References 45 publications

Relationship between sea surface temperature and the maximum intensity of tropical cyclones affecting Vietnam's coastline

Relationship between sea surface temperature and the maximum intensity of tropical cyclones affecting Vietnam's coastline

Stabilization of stage–discharge curves following the establishment of forest plantations: Implications for sediment production

Managing the Urban Environment of Jakarta, Indonesia

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