Optimizing urban stormwater control strategies and assessing aquifer recharge through drywells in an urban watershed

Boroomandnia, Arezoo; Bozorg‐Haddad, Omid; Bahrami, Mahdi; Goharian, Erfan; Singh, Vijay P.; Loáiciga, Hugo A.

doi:10.1007/s10040-021-02316-0

Cited by 7 publications

(2 citation statements)

References 60 publications

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“…Selain dapat menjadi metode tampungan hujan, SRAP juga berfungsi memfilter air sebelum terserap ke dalam tanah, sehingga meningkatkan kualitas air tanah (Beganskas & Fisher 2017;Edwards et al, 2016;Gonzalez-Merchan et al, 2012). Perencanaan SRAP harus memperhatikan kondisi tanah, dimensi setiap sumur, jarak antar sumur dan kondisi bangunan lain sekitar untuk memastikan sumur resapan berfungsi dengan efisien (Boroomandnia et al, 2021;Edwards et al, 2016). Besarnya kapasitas penyerapannya dapat dilihat pada persamaan (11).…”

Section: Sumur Resapan Air Hujanunclassified

Optimalisasi Penerapan Kebijakan Zero Delta Q Policy dalam Skala Perumahan di Balikpapan

Yanti

Pratama

Sukmara

et al. 2022

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Alih fungsi kawasan hijau menjadi perumahan Daun Village Balikpapan diduga merupakan salah satu faktor yang menyebabkan peningkatan debit pada saluran sekunder Balikpapan Baru dan Syarifuddin Yoes. Berbagai upaya pengembang perumahan dalam mengatasi masalah ini dengan membangun kolam tampung untuk menampung kelebihan debit tidak cukup untuk menampung seluruh peningkatan debit yang terjadi sehingga tidak sesuai dengan Prinsip Zero Delta Q (ZDQP). Diperlukan penerapan ZDQP yang lebih komprehensif untuk mengurangi dampak pembangunan perumahan ini. Penelitian ini dilakukan dengan melakukan analisis curah hujan harian maksimum 20 tahun terakhir, analisis perubahan debit, dan analisis skenario penerapan ZDQP untuk mendapatkan debit banjir yang sama sebelum dan setelah pembangunan. Metode yang digunakan untuk mengurangi dampak banjir adalah optimalisasi kolam tampung, penerapan lubang resapan biopori dan penambahan kolam tampung, yang mengurangi debit banjir pada wilayah catchment Sub-DAS Balikpapan Baru dan Sub-DAS Syarifuddin Yoes sebesar 4,21 m3/det dan 0,38 m3/det. Implementasi ZDQP pada skenario ini menghasilkan debit setelah rencana yang besarnya sama dengan debit sebelum pembangunan, sehingga pembangunan tidak menambah beban saluran drainase kota.

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Section: Sumur Resapan Air Hujanunclassified

Optimalisasi Penerapan Kebijakan Zero Delta Q Policy dalam Skala Perumahan di Balikpapan

Yanti

Pratama

Sukmara

et al. 2022

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“…The simulated setting represents a typical case in the urbanized alluvial plains and valleys of China. Soils with different hydraulic characteristics are implemented in a MODFLOW groundwater model [25], and results are compared with an ensemble of Sponge City installations, as suggested by [8], using the Storm Water Management Model (SWMM) [26,27]. Via the following analysis, the proposed method (1) quantifies the advantages and limits of the urban aquifers; and (2) compiles an absorbance map for the urban areas of China to assist in the improvement of the Sponge City performance.…”

Section: Introductionmentioning

confidence: 99%

The Role of Aquifers in Sustaining the Sponge City Concept in Chinese High-Density Housing

Jin

Lancia

Tian

et al. 2022

Water

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Chinese cities and megacities occupy large areas with high population densities. These urban sectors have extensive impervious surfaces and import large amounts of water from pristine sources, putting pressure on the urban drainage systems during storms. To reduce flood risk and tackle water scarcity, the Chinese government promulgated the Sponge City concept: an ensemble of absorbing features, including permeable pavements and green roofs, to reduce urban runoff and increase water storage. We evaluate the benefits of merging the urban aquifer with conventional Sponge City features by simulating stormwater storage in aquifers with a groundwater model (MODFLOW) and a stormwater management model (SWMM). The urban aquifers of an ideal district, characterized by high-density housing and a flat morphology, collect and dissipate extreme rains (200 mm in 6 h) when the hydraulic conductivity of the subsoil is higher than 1·10−5 m/s, roughly corresponding to a medium productive aquifer. Economic and ecological benefits at the catchment scale are also discussed. Suitable shallow aquifers are individuated and discussed throughout China via a hydrogeological and geomorphological approach. The proposed method increases the percentage of water that can be controlled above that obtained through conventional Sponge City features.

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Os poços na zona vadosa podem ser retrolavados para recuperar a capacidade de infiltração? Conceito e teste de laboratório

Kalwa

2023

Hydrogeol J

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Vadose zone wells (VZW), or drywells, allow for high infiltration rates combined with small area demand. Nevertheless, they are rarely used for managed aquifer recharge, since turbid water leads to gradual clogging and a reduction in infiltration capacity. Established redevelopment measures require backflushing, which is commonly considered impossible for VZWs, making them “non regenerable”. In this study, the possibility of backflushing a VZW is discussed. Key to the underlying approach is isolating the lower (clogged) section of a well and saturating its surrounding with water by infiltration via the upper (unclogged) screen. Subsequently, underpressure sucks water from the surrounding soil into the isolated section. The approach was tested with and without a gravel pack, on laboratory scale, showing a successful reversal of flow direction in both cases. The degree of redevelopment was quantified by measuring the drainage time of the well, which increased from initially 45 s without gravel pack and 40 s with gravel pack to 9,500 and 11,000 s, respectively, after clogging. After backflushing, the well with gravel pack showed a median drainage time of 95 s, which remained stable over ten cycles of clogging and backflushing. In contrast, drainage time of the well without gravel pack increased continuously to >170 s, even after vibrator application. In conclusion, it can be stated that the backflush of a VZW with the presented approach is possible and has an effect on the well’s infiltration capacity, though it seems more effective for wells with gravel pack.

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Optimizing urban stormwater control strategies and assessing aquifer recharge through drywells in an urban watershed

Cited by 7 publications

References 60 publications

Optimalisasi Penerapan Kebijakan Zero Delta Q Policy dalam Skala Perumahan di Balikpapan

Optimalisasi Penerapan Kebijakan Zero Delta Q Policy dalam Skala Perumahan di Balikpapan

The Role of Aquifers in Sustaining the Sponge City Concept in Chinese High-Density Housing

Os poços na zona vadosa podem ser retrolavados para recuperar a capacidade de infiltração? Conceito e teste de laboratório

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